InterviewSolution
Saved Bookmarks
InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Which of the following is not a donor atom? |
| Answer» <html><body><p> Aluminium</p><br/><br/><p>Aluminium is an <a href="https://interviewquestions.tuteehub.com/tag/acceptor-846761" style="font-weight:bold;" target="_blank" title="Click to know more about ACCEPTOR">ACCEPTOR</a> atom, an impurity atom in a semiconductor, which can accept or take up one or more electrons from the crystal and become negatively charged.In semiconductor physics. It is a dopant atom that when added to a semiconductor can form a p-type region. For example, when silicon (<a href="https://interviewquestions.tuteehub.com/tag/si-630826" style="font-weight:bold;" target="_blank" title="Click to know more about SI">SI</a>), having four valence electrons, needs to be doped as a p-type semiconductor, elements from group <a href="https://interviewquestions.tuteehub.com/tag/iii-497983" style="font-weight:bold;" target="_blank" title="Click to know more about III">III</a> like boron (B) or aluminium (Al), having three valence electrons, can be used. The latter elements are also called trivalent impurities. Other trivalent dopants include <a href="https://interviewquestions.tuteehub.com/tag/indium-514823" style="font-weight:bold;" target="_blank" title="Click to know more about INDIUM">INDIUM</a> (In) and <a href="https://interviewquestions.tuteehub.com/tag/gallium-470062" style="font-weight:bold;" target="_blank" title="Click to know more about GALLIUM">GALLIUM</a> (Ga).</p></body></html> | |
| 102. |
Which among the following is used to dilute oxygen in the gas cylinders used by divers ? |
| Answer» <html><body><p> Helium</p><br/><br/><p>Helium is <a href="https://interviewquestions.tuteehub.com/tag/used-2318798" style="font-weight:bold;" target="_blank" title="Click to know more about USED">USED</a> to dilute the oxygen and <a href="https://interviewquestions.tuteehub.com/tag/nitrogen-1118291" style="font-weight:bold;" target="_blank" title="Click to know more about NITROGEN">NITROGEN</a> to <a href="https://interviewquestions.tuteehub.com/tag/reduce-1181332" style="font-weight:bold;" target="_blank" title="Click to know more about REDUCE">REDUCE</a> these affects. Helium is the gas of <a href="https://interviewquestions.tuteehub.com/tag/choice-915996" style="font-weight:bold;" target="_blank" title="Click to know more about CHOICE">CHOICE</a> to use because it is an inert gas, is <a href="https://interviewquestions.tuteehub.com/tag/thinner-707704" style="font-weight:bold;" target="_blank" title="Click to know more about THINNER">THINNER</a>, therefore more compressible than air, and its narcotic properties are negligible in comparison to nitrogen.</p></body></html> | |
| 103. |
The main active constituent of tea and coffee is |
| Answer» <html><body><p> caffeine</p><br/><br/><p>Caffeine is the <a href="https://interviewquestions.tuteehub.com/tag/main-552371" style="font-weight:bold;" target="_blank" title="Click to know more about MAIN">MAIN</a> <a href="https://interviewquestions.tuteehub.com/tag/active-367234" style="font-weight:bold;" target="_blank" title="Click to know more about ACTIVE">ACTIVE</a> <a href="https://interviewquestions.tuteehub.com/tag/constituent-930772" style="font-weight:bold;" target="_blank" title="Click to know more about CONSTITUENT">CONSTITUENT</a> of <a href="https://interviewquestions.tuteehub.com/tag/tea-664165" style="font-weight:bold;" target="_blank" title="Click to know more about TEA">TEA</a> and <a href="https://interviewquestions.tuteehub.com/tag/coffee-421753" style="font-weight:bold;" target="_blank" title="Click to know more about COFFEE">COFFEE</a>.</p></body></html> | |
| 104. |
Heavy metals got their name because compared to other atoms they have |
| Answer» <html><body><p> Higher <a href="https://interviewquestions.tuteehub.com/tag/atomic-2477" style="font-weight:bold;" target="_blank" title="Click to know more about ATOMIC">ATOMIC</a> masses</p><br/><br/><p>Arsenic, beryllium, cadmium, <a href="https://interviewquestions.tuteehub.com/tag/chromium-916213" style="font-weight:bold;" target="_blank" title="Click to know more about CHROMIUM">CHROMIUM</a>, <a href="https://interviewquestions.tuteehub.com/tag/lead-540361" style="font-weight:bold;" target="_blank" title="Click to know more about LEAD">LEAD</a>, manganese, mercury, nickel, and <a href="https://interviewquestions.tuteehub.com/tag/selenium-639392" style="font-weight:bold;" target="_blank" title="Click to know more about SELENIUM">SELENIUM</a> are some of the metals called ‘heavy’ because of their high relative atomic mass. They persist in nature and can cause damage or death in animals, <a href="https://interviewquestions.tuteehub.com/tag/humans-1033536" style="font-weight:bold;" target="_blank" title="Click to know more about HUMANS">HUMANS</a>, and plants even at very low concentrations.</p></body></html> | |
| 105. |
The ore which is found in abundance in India is |
| Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/monazite-563150" style="font-weight:bold;" target="_blank" title="Click to know more about MONAZITE">MONAZITE</a></p><br/><br/><p>The <a href="https://interviewquestions.tuteehub.com/tag/ore-1138646" style="font-weight:bold;" target="_blank" title="Click to know more about ORE">ORE</a> which is <a href="https://interviewquestions.tuteehub.com/tag/found-458144" style="font-weight:bold;" target="_blank" title="Click to know more about FOUND">FOUND</a> in <a href="https://interviewquestions.tuteehub.com/tag/abundance-846360" style="font-weight:bold;" target="_blank" title="Click to know more about ABUNDANCE">ABUNDANCE</a> in <a href="https://interviewquestions.tuteehub.com/tag/india-54" style="font-weight:bold;" target="_blank" title="Click to know more about INDIA">INDIA</a> is monazite.</p></body></html> | |
| 106. |
The gas used to dilute oxygen for breathing by deep sea divers is: |
| Answer» <html><body><p> Helium</p><br/><br/><p>Trimix is a breathing gas, consisting of oxygen, helium and nitrogen, and is often used in deep commercial diving. The helium is included as a substitute for some of the nitrogen, to reduce the narcotic effect of the breathing gas at depth. It <a href="https://interviewquestions.tuteehub.com/tag/helps-1018140" style="font-weight:bold;" target="_blank" title="Click to know more about HELPS">HELPS</a> to reduce nitrogen <a href="https://interviewquestions.tuteehub.com/tag/narcosis-7700943" style="font-weight:bold;" target="_blank" title="Click to know more about NARCOSIS">NARCOSIS</a> and to avoid the dangers of oxygen <a href="https://interviewquestions.tuteehub.com/tag/toxicity-711533" style="font-weight:bold;" target="_blank" title="Click to know more about TOXICITY">TOXICITY</a>. With a mixture of three gases, it is <a href="https://interviewquestions.tuteehub.com/tag/possible-592355" style="font-weight:bold;" target="_blank" title="Click to know more about POSSIBLE">POSSIBLE</a> to <a href="https://interviewquestions.tuteehub.com/tag/create-427332" style="font-weight:bold;" target="_blank" title="Click to know more about CREATE">CREATE</a> mixes suitable for different depths or purposes by adjusting the proportions of each gas.</p></body></html> | |
| 107. |
Hydrogen is not found in atmosphere because |
| Answer» <html><body><p> It is the lightest gas</p><br/><br/><p>Hydrogen is a chemical element with symbol <a href="https://interviewquestions.tuteehub.com/tag/h-1014193" style="font-weight:bold;" target="_blank" title="Click to know more about H">H</a> and atomic number 1. With an average atomic weight of 1.00794 u (1.007825 u for hydrogen-1), hydrogen is the lightest element and its monatomic form (H<sub>1</sub>) is the most abundant chemical substance, constituting roughly 75% of the Universe’s baryonic mass. Nonremnant stars are mainly composed of hydrogen in its plasma state. Air is the name given to the atmosphere used in breathing and photosynthesis. Dry air <a href="https://interviewquestions.tuteehub.com/tag/contains-11473" style="font-weight:bold;" target="_blank" title="Click to know more about CONTAINS">CONTAINS</a> roughly (by <a href="https://interviewquestions.tuteehub.com/tag/volume-728707" style="font-weight:bold;" target="_blank" title="Click to know more about VOLUME">VOLUME</a>) 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of <a href="https://interviewquestions.tuteehub.com/tag/water-1449333" style="font-weight:bold;" target="_blank" title="Click to know more about WATER">WATER</a> vapor, on average around 1%. Naturally occurring atomic hydrogen is rare on Earth because hydrogen readily forms covalent compounds with most elements and is present in the water <a href="https://interviewquestions.tuteehub.com/tag/molecule-563028" style="font-weight:bold;" target="_blank" title="Click to know more about MOLECULE">MOLECULE</a> and in most organic compounds.</p></body></html> | |
| 108. |
Type metal used in printing press is an alloy of |
| Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/lead-540361" style="font-weight:bold;" target="_blank" title="Click to know more about LEAD">LEAD</a> and antimony</p><br/><br/><p>Type metal, alloy of lead, antimony, and tin used to make type characters for printing. By varying the proportions of the metals, the desired properties are produced for <a href="https://interviewquestions.tuteehub.com/tag/different-951434" style="font-weight:bold;" target="_blank" title="Click to know more about DIFFERENT">DIFFERENT</a> kinds of <a href="https://interviewquestions.tuteehub.com/tag/typecasting-3240751" style="font-weight:bold;" target="_blank" title="Click to know more about TYPECASTING">TYPECASTING</a> and printing <a href="https://interviewquestions.tuteehub.com/tag/processes-21463" style="font-weight:bold;" target="_blank" title="Click to know more about PROCESSES">PROCESSES</a>.</p></body></html> | |
| 109. |
The basic chemical building block of natural rubber obtained from trees is |
| Answer» <html><body><p> Isoprene</p><br/><br/><p>Natural <a href="https://interviewquestions.tuteehub.com/tag/rubber-16039" style="font-weight:bold;" target="_blank" title="Click to know more about RUBBER">RUBBER</a>, also called India rubber, latex, Amazonian rubber, caucho or caoutchouc, as <a href="https://interviewquestions.tuteehub.com/tag/initially-516121" style="font-weight:bold;" target="_blank" title="Click to know more about INITIALLY">INITIALLY</a> produced, consists of <a href="https://interviewquestions.tuteehub.com/tag/polymers-16104" style="font-weight:bold;" target="_blank" title="Click to know more about POLYMERS">POLYMERS</a> of the organic compound isoprene, with minor <a href="https://interviewquestions.tuteehub.com/tag/impurities-1039198" style="font-weight:bold;" target="_blank" title="Click to know more about IMPURITIES">IMPURITIES</a> of other organic compounds, plus water.</p></body></html> | |
| 110. |
Which of these acids is not organic in origin? |
| Answer» <html><body><p> Sulphuric acid</p><br/><br/><p>Sulphuric acid is produced from sulfur, oxygen and water <a href="https://interviewquestions.tuteehub.com/tag/via-723599" style="font-weight:bold;" target="_blank" title="Click to know more about VIA">VIA</a> the <a href="https://interviewquestions.tuteehub.com/tag/conventional-409840" style="font-weight:bold;" target="_blank" title="Click to know more about CONVENTIONAL">CONVENTIONAL</a> contact process (DCDA) or the wet sulfuric acid process (WSA). Sulfuric acid can be produced in the laboratory by <a href="https://interviewquestions.tuteehub.com/tag/burning-905666" style="font-weight:bold;" target="_blank" title="Click to know more about BURNING">BURNING</a> sulfur in air and dissolving the gas produced in a hydrogen peroxide <a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a>.</p></body></html> | |
| 111. |
Which of the following is the best fuel in terms of energy released per gram of fuel? |
| Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/hydrogen-22331" style="font-weight:bold;" target="_blank" title="Click to know more about HYDROGEN">HYDROGEN</a></p><br/><br/><p>The amount of energy <a href="https://interviewquestions.tuteehub.com/tag/released-613817" style="font-weight:bold;" target="_blank" title="Click to know more about RELEASED">RELEASED</a> increases with the number of bonds present in the <a href="https://interviewquestions.tuteehub.com/tag/chemical-914796" style="font-weight:bold;" target="_blank" title="Click to know more about CHEMICAL">CHEMICAL</a> <a href="https://interviewquestions.tuteehub.com/tag/substance-1231528" style="font-weight:bold;" target="_blank" title="Click to know more about SUBSTANCE">SUBSTANCE</a> or fuel. That is because each bond has a certain amount of energy stored in it therefore the more bonds the more energy is stored and more energy is released if these bonds <a href="https://interviewquestions.tuteehub.com/tag/break-903849" style="font-weight:bold;" target="_blank" title="Click to know more about BREAK">BREAK</a> through combustion. Theoretical values of energy released per gram of fuel (in joules/ gram) are: Hydrogen: 142.5 KJ/g; Methane: 55.6 KJ/ g; Ethanol: 29.7 KJ/g; Butane: 49.6KJ/g.</p></body></html> | |
| 112. |
Zone refining is used for the purification of |
| Answer» <html><body><p> Ge</p><br/><br/><p>Zone refining is a very <a href="https://interviewquestions.tuteehub.com/tag/useful-1441152" style="font-weight:bold;" target="_blank" title="Click to know more about USEFUL">USEFUL</a> <a href="https://interviewquestions.tuteehub.com/tag/method-559432" style="font-weight:bold;" target="_blank" title="Click to know more about METHOD">METHOD</a> to get metals with very high purity such as <a href="https://interviewquestions.tuteehub.com/tag/silicon-1207644" style="font-weight:bold;" target="_blank" title="Click to know more about SILICON">SILICON</a> and <a href="https://interviewquestions.tuteehub.com/tag/germanium-472683" style="font-weight:bold;" target="_blank" title="Click to know more about GERMANIUM">GERMANIUM</a>. It is also referred to as zone melting, <a href="https://interviewquestions.tuteehub.com/tag/floating-992903" style="font-weight:bold;" target="_blank" title="Click to know more about FLOATING">FLOATING</a> zone process, and travelling melting zone.</p></body></html> | |
| 113. |
Table salt gets moist during rainy season because |
| Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/sodium-1215510" style="font-weight:bold;" target="_blank" title="Click to know more about SODIUM">SODIUM</a> chloride contains hygroscopic impurities like magnesium chloride</p><br/><br/><p>Table salt is refined salt, which contains about <a href="https://interviewquestions.tuteehub.com/tag/97-342717" style="font-weight:bold;" target="_blank" title="Click to know more about 97">97</a> to 99 percent sodium chloride. It usually contains substances that <a href="https://interviewquestions.tuteehub.com/tag/make-546668" style="font-weight:bold;" target="_blank" title="Click to know more about MAKE">MAKE</a> it free-flowing (anticaking agents) such as sodium <a href="https://interviewquestions.tuteehub.com/tag/aluminosilicate-1974549" style="font-weight:bold;" target="_blank" title="Click to know more about ALUMINOSILICATE">ALUMINOSILICATE</a> or magnesium <a href="https://interviewquestions.tuteehub.com/tag/carbonate-909380" style="font-weight:bold;" target="_blank" title="Click to know more about CARBONATE">CARBONATE</a>. Because of Hygroscopic nature of salt it become wet in rainy season as the salt absorbs moisture from environment.</p></body></html> | |
| 114. |
Water is not effective in extinguishing a fire caused by petrol because |
| Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/water-1449333" style="font-weight:bold;" target="_blank" title="Click to know more about WATER">WATER</a> and petrol are immiscible with each other and petrol which forms the upper layer <a href="https://interviewquestions.tuteehub.com/tag/continues-2542063" style="font-weight:bold;" target="_blank" title="Click to know more about CONTINUES">CONTINUES</a> to burn</p><br/><br/><p>As water is heavier than petrol therefore slips down permitting the petrol to <a href="https://interviewquestions.tuteehub.com/tag/rise-1189674" style="font-weight:bold;" target="_blank" title="Click to know more about RISE">RISE</a> to the surface and <a href="https://interviewquestions.tuteehub.com/tag/continue-409821" style="font-weight:bold;" target="_blank" title="Click to know more about CONTINUE">CONTINUE</a> to burn. Besides, the existing temperature is so high that the water poured on the fire evaporates even before it can extinguisher the fire. Thus the petrol fire cannot be extinguished by water.</p></body></html> | |
| 115. |
Formation of ozone hole is maximum over |
| Answer» <html><body><p> Antarctica</p><br/><br/><p>Ozone holes are formed in Antarctica and these are due to <a href="https://interviewquestions.tuteehub.com/tag/special-632090" style="font-weight:bold;" target="_blank" title="Click to know more about SPECIAL">SPECIAL</a> clouds that form in the stratosphere <a href="https://interviewquestions.tuteehub.com/tag/called-907796" style="font-weight:bold;" target="_blank" title="Click to know more about CALLED">CALLED</a> polar <a href="https://interviewquestions.tuteehub.com/tag/stratospheric-7711561" style="font-weight:bold;" target="_blank" title="Click to know more about STRATOSPHERIC">STRATOSPHERIC</a> clouds. Clouds usually do not form in stratosphere, this can happen only at such <a href="https://interviewquestions.tuteehub.com/tag/low-537644" style="font-weight:bold;" target="_blank" title="Click to know more about LOW">LOW</a> temperatures. These clouds accumulate pollutants resulting in <a href="https://interviewquestions.tuteehub.com/tag/formation-996531" style="font-weight:bold;" target="_blank" title="Click to know more about FORMATION">FORMATION</a> of ozone holes.</p></body></html> | |
| 116. |
Baryllium Sulphate is less soluble in water due to |
| Answer» <html><body><p> High <a href="https://interviewquestions.tuteehub.com/tag/inflammable-1043615" style="font-weight:bold;" target="_blank" title="Click to know more about INFLAMMABLE">INFLAMMABLE</a> energy</p><br/><br/><p>Baryllium sulfate (BeSO<sub>4</sub>) is a white crystalline solid. It was first isolated in 1815 by Jons Jakob Berzelius. Beryllium sulfate may be prepared by <a href="https://interviewquestions.tuteehub.com/tag/treating-712500" style="font-weight:bold;" target="_blank" title="Click to know more about TREATING">TREATING</a> an aqueous solution of any beryllium salt with sulfuric acid, followed by evaporation of the solution and crystallization. The <a href="https://interviewquestions.tuteehub.com/tag/hydrated-2721634" style="font-weight:bold;" target="_blank" title="Click to know more about HYDRATED">HYDRATED</a> product may be converted to anhydrous salt by heating at 400°C. Baryllium Sulphate is less soluble in water due to High inflammable energy.</p></body></html> | |
| 117. |
The gas used in the manufacture of vanaspati from vegetable oil is |
| Answer» <html><body><p> hydrogen</p><br/><br/><p>Hydrogenation - to treat with hydrogen - is a chemical <a href="https://interviewquestions.tuteehub.com/tag/reaction-22747" style="font-weight:bold;" target="_blank" title="Click to know more about REACTION">REACTION</a> between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst. The <a href="https://interviewquestions.tuteehub.com/tag/process-11618" style="font-weight:bold;" target="_blank" title="Click to know more about PROCESS">PROCESS</a> is <a href="https://interviewquestions.tuteehub.com/tag/commonly-2530443" style="font-weight:bold;" target="_blank" title="Click to know more about COMMONLY">COMMONLY</a> employed to reduce or saturate organic compounds. The largest scale application of hydrogenation is for the <a href="https://interviewquestions.tuteehub.com/tag/processing-25579" style="font-weight:bold;" target="_blank" title="Click to know more about PROCESSING">PROCESSING</a> of vegetable oils (fats to give margarine and related spreads and shortenings). Typical vegetable oils are derived from polyunsaturated fatty acids (containing more than one carbon-carbon double bonds). Their partial hydrogenation <a href="https://interviewquestions.tuteehub.com/tag/reduces-621012" style="font-weight:bold;" target="_blank" title="Click to know more about REDUCES">REDUCES</a> most but not all, of these carbon-carbon double bonds. Hydrogenation converts liquid vegetable oils into solid or semi-solid fats, such as those present in margarine.</p></body></html> | |
| 118. |
A matured mammalian cell without nucleus is |
| Answer» <html><body><p> Erythrocyte<br/></p><br/><br/><p>Mammalian erythrocytes are unique among the vertebrates as they are non-nucleated <a href="https://interviewquestions.tuteehub.com/tag/cells-25681" style="font-weight:bold;" target="_blank" title="Click to know more about CELLS">CELLS</a> in their mature form. These cells have nuclei during early phases of erythropoiesis, but <a href="https://interviewquestions.tuteehub.com/tag/extrude-7266396" style="font-weight:bold;" target="_blank" title="Click to know more about EXTRUDE">EXTRUDE</a> them during development as they mature in order to provide more space for hemoglobin. In mammals, erythrocytes <a href="https://interviewquestions.tuteehub.com/tag/also-373387" style="font-weight:bold;" target="_blank" title="Click to know more about ALSO">ALSO</a> lose all other cellular organelles such as their mitochondria, <a href="https://interviewquestions.tuteehub.com/tag/golgi-474820" style="font-weight:bold;" target="_blank" title="Click to know more about GOLGI">GOLGI</a> apparatus and endoplasmic <a href="https://interviewquestions.tuteehub.com/tag/reticulum-1187763" style="font-weight:bold;" target="_blank" title="Click to know more about RETICULUM">RETICULUM</a>.</p></body></html> | |
| 119. |
Maximum permissible concentration of copper in drinking water in mg/L is |
| Answer» <html><body><p> 1.0</p><br/><br/><p>The 1959 WHO International Standards for Drinking Water suggested that concentrations of <a href="https://interviewquestions.tuteehub.com/tag/copper-933790" style="font-weight:bold;" target="_blank" title="Click to know more about COPPER">COPPER</a> greater than 1.5 mg/litre would <a href="https://interviewquestions.tuteehub.com/tag/markedly-7383007" style="font-weight:bold;" target="_blank" title="Click to know more about MARKEDLY">MARKEDLY</a> <a href="https://interviewquestions.tuteehub.com/tag/impair-498917" style="font-weight:bold;" target="_blank" title="Click to know more about IMPAIR">IMPAIR</a> the potability of the water. However, in the first edition of the Guidelines for Drinking Water Quality, published in 1984, a guideline value of 1.0 mg/litre was <a href="https://interviewquestions.tuteehub.com/tag/established-446764" style="font-weight:bold;" target="_blank" title="Click to know more about ESTABLISHED">ESTABLISHED</a> for copper, <a href="https://interviewquestions.tuteehub.com/tag/based-389387" style="font-weight:bold;" target="_blank" title="Click to know more about BASED">BASED</a> on its laundry and other staining properties.</p></body></html> | |
| 120. |
Which one of the following is used as preservative for foodstuff ? |
| Answer» <html><body><p> Sodium Benzoate</p><br/><br/><p>Sodium benzoate is a preservative. It is <a href="https://interviewquestions.tuteehub.com/tag/bacteriostatic-7740080" style="font-weight:bold;" target="_blank" title="Click to know more about BACTERIOSTATIC">BACTERIOSTATIC</a> and fungistatic under acidic conditions. It is most <a href="https://interviewquestions.tuteehub.com/tag/widely-732348" style="font-weight:bold;" target="_blank" title="Click to know more about WIDELY">WIDELY</a> used in acidic foods such as <a href="https://interviewquestions.tuteehub.com/tag/salad-1193441" style="font-weight:bold;" target="_blank" title="Click to know more about SALAD">SALAD</a> dressings (vinegar), <a href="https://interviewquestions.tuteehub.com/tag/carbonated-7671982" style="font-weight:bold;" target="_blank" title="Click to know more about CARBONATED">CARBONATED</a> drinks (carbonic acid), jams and fruit juices (citric acid), pickles (vinegar), and condiments. It is also used as a preservative in medicines and <a href="https://interviewquestions.tuteehub.com/tag/cosmetics-936127" style="font-weight:bold;" target="_blank" title="Click to know more about COSMETICS">COSMETICS</a>.</p></body></html> | |
| 121. |
Hardness of the water is commonly measured in terms of |
| Answer» <html><body><p> Calcium <a href="https://interviewquestions.tuteehub.com/tag/carbonate-909380" style="font-weight:bold;" target="_blank" title="Click to know more about CARBONATE">CARBONATE</a> <a href="https://interviewquestions.tuteehub.com/tag/equivalents-974752" style="font-weight:bold;" target="_blank" title="Click to know more about EQUIVALENTS">EQUIVALENTS</a></p><br/><br/><p>Hardness of the water is <a href="https://interviewquestions.tuteehub.com/tag/commonly-2530443" style="font-weight:bold;" target="_blank" title="Click to know more about COMMONLY">COMMONLY</a> measured in <a href="https://interviewquestions.tuteehub.com/tag/terms-1242559" style="font-weight:bold;" target="_blank" title="Click to know more about TERMS">TERMS</a> of calcium carbonate equivalents.</p></body></html> | |
| 122. |
Which gas is used for converting vegetable oils into saturated fats ? |
| Answer» <html><body><p> H<sub>2</sub></p><br/><br/><p>Hydrogenation - to <a href="https://interviewquestions.tuteehub.com/tag/treat-661823" style="font-weight:bold;" target="_blank" title="Click to know more about TREAT">TREAT</a> with hydrogen - is a <a href="https://interviewquestions.tuteehub.com/tag/chemical-914796" style="font-weight:bold;" target="_blank" title="Click to know more about CHEMICAL">CHEMICAL</a> <a href="https://interviewquestions.tuteehub.com/tag/reaction-22747" style="font-weight:bold;" target="_blank" title="Click to know more about REACTION">REACTION</a> between molecular hydrogen (H<sub>2</sub>) and another compound or element, usually in the presence of a catalyst. The largest scale application of hydrogenation is for the processing of vegetable oils (<a href="https://interviewquestions.tuteehub.com/tag/fats-985417" style="font-weight:bold;" target="_blank" title="Click to know more about FATS">FATS</a> to give margarine and related spreads and shortenings). Typical vegetable oils are derived from <a href="https://interviewquestions.tuteehub.com/tag/polyunsaturated-7383398" style="font-weight:bold;" target="_blank" title="Click to know more about POLYUNSATURATED">POLYUNSATURATED</a> fatty acids (containing more than one carbon-carbon double bonds). Their partial hydrogenation reduces most but not all, of these carbon-carbon double bonds.</p></body></html> | |
| 123. |
The maximum number of isomers for an alkene with molecular formula C4H8 is |
| Answer» <html><body><p> 4</p><br/><br/><p>The <a href="https://interviewquestions.tuteehub.com/tag/maximum-556915" style="font-weight:bold;" target="_blank" title="Click to know more about MAXIMUM">MAXIMUM</a> number of isomers for an <a href="https://interviewquestions.tuteehub.com/tag/alkene-853361" style="font-weight:bold;" target="_blank" title="Click to know more about ALKENE">ALKENE</a> with molecular <a href="https://interviewquestions.tuteehub.com/tag/formula-464310" style="font-weight:bold;" target="_blank" title="Click to know more about FORMULA">FORMULA</a> C<sub>4</sub>H<sub>8</sub> is 4.</p></body></html> | |
| 124. |
Sodium Carbonate is commonly known as |
| Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/washing-733498" style="font-weight:bold;" target="_blank" title="Click to know more about WASHING">WASHING</a> <a href="https://interviewquestions.tuteehub.com/tag/soda-1215481" style="font-weight:bold;" target="_blank" title="Click to know more about SODA">SODA</a></p><br/><br/><p>Sodium <a href="https://interviewquestions.tuteehub.com/tag/carbonate-909380" style="font-weight:bold;" target="_blank" title="Click to know more about CARBONATE">CARBONATE</a> is <a href="https://interviewquestions.tuteehub.com/tag/commonly-2530443" style="font-weight:bold;" target="_blank" title="Click to know more about COMMONLY">COMMONLY</a> <a href="https://interviewquestions.tuteehub.com/tag/known-534098" style="font-weight:bold;" target="_blank" title="Click to know more about KNOWN">KNOWN</a> as Washing Soda.</p></body></html> | |
| 125. |
Which one of the following is not present in cement ? |
| Answer» <html><body><p> Alum</p><br/><br/><p>Gypsum is <a href="https://interviewquestions.tuteehub.com/tag/added-367625" style="font-weight:bold;" target="_blank" title="Click to know more about ADDED">ADDED</a> in <a href="https://interviewquestions.tuteehub.com/tag/calculated-907694" style="font-weight:bold;" target="_blank" title="Click to know more about CALCULATED">CALCULATED</a> quantity in <a href="https://interviewquestions.tuteehub.com/tag/order-1138220" style="font-weight:bold;" target="_blank" title="Click to know more about ORDER">ORDER</a> to adjust the rate of <a href="https://interviewquestions.tuteehub.com/tag/setting-640474" style="font-weight:bold;" target="_blank" title="Click to know more about SETTING">SETTING</a> of cement. Alum is not <a href="https://interviewquestions.tuteehub.com/tag/present-1163722" style="font-weight:bold;" target="_blank" title="Click to know more about PRESENT">PRESENT</a> in cement.</p></body></html> | |
| 126. |
What is the element that is in the highest percentage in the composition of the earth ? |
| Answer» <html><body><p> Oxygen</p><br/><br/><p>Oxygen has the <a href="https://interviewquestions.tuteehub.com/tag/highest-1022683" style="font-weight:bold;" target="_blank" title="Click to know more about HIGHEST">HIGHEST</a> percentage in both human <a href="https://interviewquestions.tuteehub.com/tag/body-900196" style="font-weight:bold;" target="_blank" title="Click to know more about BODY">BODY</a> and on earth, but <a href="https://interviewquestions.tuteehub.com/tag/carbon-16249" style="font-weight:bold;" target="_blank" title="Click to know more about CARBON">CARBON</a>, the element with the second highest percentage in the body, is <a href="https://interviewquestions.tuteehub.com/tag/relatively-621723" style="font-weight:bold;" target="_blank" title="Click to know more about RELATIVELY">RELATIVELY</a> rare on Earth.</p></body></html> | |
| 127. |
Calcium salts used as fertilizer is : |
| Answer» <html><body><p> Calcium <a href="https://interviewquestions.tuteehub.com/tag/sulphate-1234306" style="font-weight:bold;" target="_blank" title="Click to know more about SULPHATE">SULPHATE</a></p><br/><br/><p>Sulphur (as sulphate) is a major plant nutrient, and is <a href="https://interviewquestions.tuteehub.com/tag/essential-975317" style="font-weight:bold;" target="_blank" title="Click to know more about ESSENTIAL">ESSENTIAL</a> for crop growth. Calcium Sulphate (gypsum) is used to improve soil <a href="https://interviewquestions.tuteehub.com/tag/quality-17732" style="font-weight:bold;" target="_blank" title="Click to know more about QUALITY">QUALITY</a>. Calcium sulphate acts as a pH <a href="https://interviewquestions.tuteehub.com/tag/buffer-905159" style="font-weight:bold;" target="_blank" title="Click to know more about BUFFER">BUFFER</a>, which can contribute to neutralizing both soil alkalinity and acidity. It is mainly used for the reclamation of sodic <a href="https://interviewquestions.tuteehub.com/tag/soils-1216264" style="font-weight:bold;" target="_blank" title="Click to know more about SOILS">SOILS</a> through ion exchange (calcium replacing sodium).</p></body></html> | |
| 128. |
The number of hydrogen bonds between guanine and cytosine in DNA is |
| Answer» <html><body><p> 3</p><br/><br/><p>There are <a href="https://interviewquestions.tuteehub.com/tag/two-714195" style="font-weight:bold;" target="_blank" title="Click to know more about TWO">TWO</a> <a href="https://interviewquestions.tuteehub.com/tag/hydrogen-22331" style="font-weight:bold;" target="_blank" title="Click to know more about HYDROGEN">HYDROGEN</a> bonds between adenine and <a href="https://interviewquestions.tuteehub.com/tag/thymine-1419619" style="font-weight:bold;" target="_blank" title="Click to know more about THYMINE">THYMINE</a> (A=T) and three hydrogen bonds between <a href="https://interviewquestions.tuteehub.com/tag/cytosine-942851" style="font-weight:bold;" target="_blank" title="Click to know more about CYTOSINE">CYTOSINE</a> and guanine (G=C).</p></body></html> | |
| 129. |
Ultraviolet radiation striking the earth is due to the depletion of |
| Answer» <html><body><p> Ozone</p><br/><br/><p>Ultraviolet <a href="https://interviewquestions.tuteehub.com/tag/radiation-1175811" style="font-weight:bold;" target="_blank" title="Click to know more about RADIATION">RADIATION</a> <a href="https://interviewquestions.tuteehub.com/tag/striking-1229497" style="font-weight:bold;" target="_blank" title="Click to know more about STRIKING">STRIKING</a> the <a href="https://interviewquestions.tuteehub.com/tag/earth-13129" style="font-weight:bold;" target="_blank" title="Click to know more about EARTH">EARTH</a> is <a href="https://interviewquestions.tuteehub.com/tag/due-433472" style="font-weight:bold;" target="_blank" title="Click to know more about DUE">DUE</a> to the depletion of ozone.</p></body></html> | |
| 130. |
In organic compounds, nitrogen is estimated by |
| Answer» <html><body><p> Dumas method</p><br/><br/><p>Duma's method can be used to <a href="https://interviewquestions.tuteehub.com/tag/estimate-25704" style="font-weight:bold;" target="_blank" title="Click to know more about ESTIMATE">ESTIMATE</a> nitrogen in all type of organic compounds. Detection of nitrogen is done by Lassigne's <a href="https://interviewquestions.tuteehub.com/tag/test-13460" style="font-weight:bold;" target="_blank" title="Click to know more about TEST">TEST</a>. <a href="https://interviewquestions.tuteehub.com/tag/estimation-25703" style="font-weight:bold;" target="_blank" title="Click to know more about ESTIMATION">ESTIMATION</a> of <a href="https://interviewquestions.tuteehub.com/tag/phosphorus-1153299" style="font-weight:bold;" target="_blank" title="Click to know more about PHOSPHORUS">PHOSPHORUS</a> is done by <a href="https://interviewquestions.tuteehub.com/tag/carius-2500689" style="font-weight:bold;" target="_blank" title="Click to know more about CARIUS">CARIUS</a> method.</p></body></html> | |
| 131. |
When a spoon is to be electroplated with nickel the spoon is |
| Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/made-3718337" style="font-weight:bold;" target="_blank" title="Click to know more about MADE">MADE</a> cathode and a pure nickel red, the anode</p><br/><br/><p>Electroplating is the deposition by electrolysis of a coating of metal upon a conducting <a href="https://interviewquestions.tuteehub.com/tag/surface-1235573" style="font-weight:bold;" target="_blank" title="Click to know more about SURFACE">SURFACE</a>. The simplest system makes the object to be <a href="https://interviewquestions.tuteehub.com/tag/plated-7704179" style="font-weight:bold;" target="_blank" title="Click to know more about PLATED">PLATED</a> the negative electrode (cathode) or plate in a galvanic couple. <a href="https://interviewquestions.tuteehub.com/tag/thus-2307358" style="font-weight:bold;" target="_blank" title="Click to know more about THUS">THUS</a> a spoon or other object may be <a href="https://interviewquestions.tuteehub.com/tag/connected-929389" style="font-weight:bold;" target="_blank" title="Click to know more about CONNECTED">CONNECTED</a> by a wire to a plate of nickel. The process that occurs on the spoon is called reduction and, therefore, the spoon is also referred to as a cathode.</p></body></html> | |
| 132. |
The laws of electrolysis are given by |
| Answer» <html><body><p> Faraday</p><br/><br/><p>Faraday's laws of electrolysis, in chemistry, are quantitative laws used to express <a href="https://interviewquestions.tuteehub.com/tag/magnitudes-1083155" style="font-weight:bold;" target="_blank" title="Click to know more about MAGNITUDES">MAGNITUDES</a> of electrolytic <a href="https://interviewquestions.tuteehub.com/tag/effects-449163" style="font-weight:bold;" target="_blank" title="Click to know more about EFFECTS">EFFECTS</a>, first described by the English <a href="https://interviewquestions.tuteehub.com/tag/scientist-638048" style="font-weight:bold;" target="_blank" title="Click to know more about SCIENTIST">SCIENTIST</a> Michael Faraday in <a href="https://interviewquestions.tuteehub.com/tag/1833-1799218" style="font-weight:bold;" target="_blank" title="Click to know more about 1833">1833</a>.</p></body></html> | |
| 133. |
The chemical used in embalming biological materials is |
| Answer» <html><body><p> Formaldehyde in water</p><br/><br/><p>Embalming fluids <a href="https://interviewquestions.tuteehub.com/tag/use-1441041" style="font-weight:bold;" target="_blank" title="Click to know more about USE">USE</a> formaldehyde as a <a href="https://interviewquestions.tuteehub.com/tag/preservative-1164134" style="font-weight:bold;" target="_blank" title="Click to know more about PRESERVATIVE">PRESERVATIVE</a>. Formaldehyde is the simplest <a href="https://interviewquestions.tuteehub.com/tag/aldehyde-853095" style="font-weight:bold;" target="_blank" title="Click to know more about ALDEHYDE">ALDEHYDE</a> with the <a href="https://interviewquestions.tuteehub.com/tag/chemical-914796" style="font-weight:bold;" target="_blank" title="Click to know more about CHEMICAL">CHEMICAL</a> formula HCHO. Formalin is a solution of formaldehyde in water, <a href="https://interviewquestions.tuteehub.com/tag/usually-722248" style="font-weight:bold;" target="_blank" title="Click to know more about USUALLY">USUALLY</a> with a small amount of methanol added. It is widely used as an antiseptic, disinfectant and preservative for biological materials.</p></body></html> | |
| 134. |
In vulcanisation process, rubber can be hardened by adding |
| Answer» <html><body><p> Sulphur</p><br/><br/><p>In order to <a href="https://interviewquestions.tuteehub.com/tag/give-468520" style="font-weight:bold;" target="_blank" title="Click to know more about GIVE">GIVE</a> more <a href="https://interviewquestions.tuteehub.com/tag/strength-1229153" style="font-weight:bold;" target="_blank" title="Click to know more about STRENGTH">STRENGTH</a> and more <a href="https://interviewquestions.tuteehub.com/tag/elasticity-14238" style="font-weight:bold;" target="_blank" title="Click to know more about ELASTICITY">ELASTICITY</a>, natural rubber is heated with sulphur or sulphur compounds at 150°C <a href="https://interviewquestions.tuteehub.com/tag/temperature-11887" style="font-weight:bold;" target="_blank" title="Click to know more about TEMPERATURE">TEMPERATURE</a>. Vulcanized rubber has good tensile strength.</p></body></html> | |
| 135. |
Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has |
| Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/stable-1223548" style="font-weight:bold;" target="_blank" title="Click to know more about STABLE">STABLE</a> half filled 2p sub level</p><br/><br/><p>Nitrogen has a half filled orbital. On the other <a href="https://interviewquestions.tuteehub.com/tag/hand-1015171" style="font-weight:bold;" target="_blank" title="Click to know more about HAND">HAND</a>, since <a href="https://interviewquestions.tuteehub.com/tag/oxygen-1144542" style="font-weight:bold;" target="_blank" title="Click to know more about OXYGEN">OXYGEN</a> is already unstable <a href="https://interviewquestions.tuteehub.com/tag/relative-1183377" style="font-weight:bold;" target="_blank" title="Click to know more about RELATIVE">RELATIVE</a> to Nitrogen, by losing one electron it attains a stable half filled orbital. So oxygen undergoes <a href="https://interviewquestions.tuteehub.com/tag/ionisation-1051250" style="font-weight:bold;" target="_blank" title="Click to know more about IONISATION">IONISATION</a> at a relatively lower energy. This is why nitrogen has a higher ionisation energy than oxygen.</p></body></html> | |
| 136. |
Hard steel contains |
| Answer» <html><body><p> 0.5 to 1.5 per cent carbon</p><br/><br/><p>The term hardened steel is often used for a medium or <a href="https://interviewquestions.tuteehub.com/tag/high-479925" style="font-weight:bold;" target="_blank" title="Click to know more about HIGH">HIGH</a> carbon steel that has been given the heat treatments of quenching followed by tempering. The quenching results in the formation of metastable martensite, the fraction of which is reduced to the desired amount during tempering. This is the most common <a href="https://interviewquestions.tuteehub.com/tag/state-21805" style="font-weight:bold;" target="_blank" title="Click to know more about STATE">STATE</a> for finished articles such as tools and <a href="https://interviewquestions.tuteehub.com/tag/machine-550312" style="font-weight:bold;" target="_blank" title="Click to know more about MACHINE">MACHINE</a> parts. In contrast, the same steel composition in annealed state will be softer as <a href="https://interviewquestions.tuteehub.com/tag/required-1185621" style="font-weight:bold;" target="_blank" title="Click to know more about REQUIRED">REQUIRED</a> for forming and machining. Carbon steels which can successfully <a href="https://interviewquestions.tuteehub.com/tag/undergo-1436536" style="font-weight:bold;" target="_blank" title="Click to know more about UNDERGO">UNDERGO</a> heat-treatment have carbon content in the range of 0.30–1.70% by weight. Trace impurities of various other elements can have a significant effect on the quality of the resulting steel. Trace amounts of sulfur in particular make the steel red-short.</p></body></html> | |
| 137. |
When Hydrogen starts burning in air, it produces ? |
| Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/water-1449333" style="font-weight:bold;" target="_blank" title="Click to know more about WATER">WATER</a><br/></p><br/><br/><p>In a <a href="https://interviewquestions.tuteehub.com/tag/flame-992254" style="font-weight:bold;" target="_blank" title="Click to know more about FLAME">FLAME</a> of pure <a href="https://interviewquestions.tuteehub.com/tag/hydrogen-22331" style="font-weight:bold;" target="_blank" title="Click to know more about HYDROGEN">HYDROGEN</a> gas, burning in air, the hydrogen (H<sub>2</sub>) reacts with <a href="https://interviewquestions.tuteehub.com/tag/oxygen-1144542" style="font-weight:bold;" target="_blank" title="Click to know more about OXYGEN">OXYGEN</a> (O<sub>2</sub>) to form water (H<sub>2</sub>O) and releases heat.</p></body></html> | |
| 138. |
The purest form of water is |
| Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/rain-1176646" style="font-weight:bold;" target="_blank" title="Click to know more about RAIN">RAIN</a> <a href="https://interviewquestions.tuteehub.com/tag/water-1449333" style="font-weight:bold;" target="_blank" title="Click to know more about WATER">WATER</a></p><br/><br/><p>The <a href="https://interviewquestions.tuteehub.com/tag/purest-7703979" style="font-weight:bold;" target="_blank" title="Click to know more about PUREST">PUREST</a> <a href="https://interviewquestions.tuteehub.com/tag/form-996208" style="font-weight:bold;" target="_blank" title="Click to know more about FORM">FORM</a> of water is rain water.</p></body></html> | |
| 139. |
Among the following iron ores, the highest percentage of iron content is found in– |
| Answer» <html><body><p> Haemetite</p><br/><br/><p>Hematite, also <a href="https://interviewquestions.tuteehub.com/tag/spelled-7714899" style="font-weight:bold;" target="_blank" title="Click to know more about SPELLED">SPELLED</a> haematite, <a href="https://interviewquestions.tuteehub.com/tag/heavy-483854" style="font-weight:bold;" target="_blank" title="Click to know more about HEAVY">HEAVY</a> and relatively <a href="https://interviewquestions.tuteehub.com/tag/hard-1015537" style="font-weight:bold;" target="_blank" title="Click to know more about HARD">HARD</a> oxide mineral, ferric oxide (Fe<sub>2</sub>O<sub>3</sub>), that constitutes the most important iron ore because of its high iron content (70 percent) and its abundance. Its name is derived from the Greek word for “blood,” in allusion to its red colour. Many of the <a href="https://interviewquestions.tuteehub.com/tag/various-1443317" style="font-weight:bold;" target="_blank" title="Click to know more about VARIOUS">VARIOUS</a> forms of hematite have separate names. The steel-gray crystals and coarse-grained varieties have a brilliant metallic lustre and are known as specular iron ore; thin scaly types are called micaceous hematite. Much hematite occurs in a soft, fine-grained, earthy form called red ochre or ruddle. Intermediate between these types are compact varieties, often with a reniform surface (kidney ore) or a fibrous structure (pencil ore). Red ochre is used as a paint pigment; a purified form, rouge, is used to polish plate glass. The most important deposits of hematite are sedimentary in origin. The world’s largest production (nearly 75 million tons of hematite annually) comes from a sedimentary deposit in the Lake Superior district in <a href="https://interviewquestions.tuteehub.com/tag/north-1124498" style="font-weight:bold;" target="_blank" title="Click to know more about NORTH">NORTH</a> America.</p></body></html> | |
| 140. |
The process of removing calcium and magnesium from hard water is known as |
| Answer» <html><body><p> Water softening</p><br/><br/><p>Softening is the process of removing the dissolved calcium and magnesium <a href="https://interviewquestions.tuteehub.com/tag/salts-1193872" style="font-weight:bold;" target="_blank" title="Click to know more about SALTS">SALTS</a> that cause hardness in water. Water softening is achieved <a href="https://interviewquestions.tuteehub.com/tag/either-7265046" style="font-weight:bold;" target="_blank" title="Click to know more about EITHER">EITHER</a> by adding chemicals that <a href="https://interviewquestions.tuteehub.com/tag/form-996208" style="font-weight:bold;" target="_blank" title="Click to know more about FORM">FORM</a> <a href="https://interviewquestions.tuteehub.com/tag/insoluble-1045950" style="font-weight:bold;" target="_blank" title="Click to know more about INSOLUBLE">INSOLUBLE</a> <a href="https://interviewquestions.tuteehub.com/tag/precipitates-1162809" style="font-weight:bold;" target="_blank" title="Click to know more about PRECIPITATES">PRECIPITATES</a> or by ion exchange.</p></body></html> | |
| 141. |
Bleaching powder is used in drinking water as a/an |
| Answer» <html><body><p> Disinfectant</p><br/><br/><p>Bleaching powder, CaOCl<sub>2</sub> or calciumoxychloride is used to kill germs and <a href="https://interviewquestions.tuteehub.com/tag/bacteria-16728" style="font-weight:bold;" target="_blank" title="Click to know more about BACTERIA">BACTERIA</a> of water because it <a href="https://interviewquestions.tuteehub.com/tag/contains-11473" style="font-weight:bold;" target="_blank" title="Click to know more about CONTAINS">CONTAINS</a> chlorine element, which is good disinfecting <a href="https://interviewquestions.tuteehub.com/tag/agent-369049" style="font-weight:bold;" target="_blank" title="Click to know more about AGENT">AGENT</a>.</p></body></html> | |
| 142. |
CNG used in automobiles to check pollution, mainly consists of |
| Answer» <html><body><p> CH<sub>4</sub></p><br/><br/><p>Nature gas is 95 <a href="https://interviewquestions.tuteehub.com/tag/percent-1150333" style="font-weight:bold;" target="_blank" title="Click to know more about PERCENT">PERCENT</a> <a href="https://interviewquestions.tuteehub.com/tag/methane-1095077" style="font-weight:bold;" target="_blank" title="Click to know more about METHANE">METHANE</a> (CH<sub>4</sub>) plus four other hydrocarbons:<br/>Ethane (C<sub>2</sub>H<sub>6</sub>) - 2.5 %, Propane (C<sub>3</sub>H<sub>8</sub>) - 0.2 %, Butane (C<sub>4</sub>H<sub>10</sub>) - 0.06%, Pentanes Plus (C<sub>5</sub>H<sub>12</sub> + C<sub>10</sub>H<sub>22</sub>) -0.02%. It also contains small amounts of: <a href="https://interviewquestions.tuteehub.com/tag/nitrogen-1118291" style="font-weight:bold;" target="_blank" title="Click to know more about NITROGEN">NITROGEN</a> (N<sub>2</sub>) - 1.6%, Carbon Dixoide (CO<sub>2</sub>) - 0.7%, Hydrogen Sulphide (H<sub>2</sub>S) - <a href="https://interviewquestions.tuteehub.com/tag/trace-711570" style="font-weight:bold;" target="_blank" title="Click to know more about TRACE">TRACE</a>, Water (H<sub>2</sub>O) - trace.</p></body></html> | |
| 143. |
A powerful eye irritant present in smog is |
| Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/peroxyacetyl-598787" style="font-weight:bold;" target="_blank" title="Click to know more about PEROXYACETYL">PEROXYACETYL</a> nitrate</p><br/><br/><p>Peroxyacetyl nitrate is a secondary <a href="https://interviewquestions.tuteehub.com/tag/pollutant-1158344" style="font-weight:bold;" target="_blank" title="Click to know more about POLLUTANT">POLLUTANT</a> present in photochemical smog. It is <a href="https://interviewquestions.tuteehub.com/tag/thermally-7718413" style="font-weight:bold;" target="_blank" title="Click to know more about THERMALLY">THERMALLY</a> <a href="https://interviewquestions.tuteehub.com/tag/unstable-717952" style="font-weight:bold;" target="_blank" title="Click to know more about UNSTABLE">UNSTABLE</a> and decomposes into peroxyethanoyl radicals and nitrogen dioxide gas. It is a <a href="https://interviewquestions.tuteehub.com/tag/lachrymatory-7694251" style="font-weight:bold;" target="_blank" title="Click to know more about LACHRYMATORY">LACHRYMATORY</a> substance.</p></body></html> | |
| 144. |
Which of the following metals is not a pollutant ? |
| Answer» <html><body><p> Aluminium</p><br/><br/><p>Aluminium is not a <a href="https://interviewquestions.tuteehub.com/tag/pollutant-1158344" style="font-weight:bold;" target="_blank" title="Click to know more about POLLUTANT">POLLUTANT</a>.</p></body></html> | |
| 145. |
Which of the following is not a natural source of air pollution ? |
| Answer» <html><body><p> None of the above</p><br/><br/><p>Natural pollution comes from natural sources like <a href="https://interviewquestions.tuteehub.com/tag/release-1183763" style="font-weight:bold;" target="_blank" title="Click to know more about RELEASE">RELEASE</a> of methane by cattle and paddy fields, carbon dioxide from plants and animals, <a href="https://interviewquestions.tuteehub.com/tag/dust-960865" style="font-weight:bold;" target="_blank" title="Click to know more about DUST">DUST</a> storms, nitrogen <a href="https://interviewquestions.tuteehub.com/tag/oxides-1144499" style="font-weight:bold;" target="_blank" title="Click to know more about OXIDES">OXIDES</a>, ozone, volcanic eruptions, emission of natural gas, sol erosion, ultraviolet rays,<a href="https://interviewquestions.tuteehub.com/tag/etc-975753" style="font-weight:bold;" target="_blank" title="Click to know more about ETC">ETC</a>. Mercury is not a cause of natural pollution.</p></body></html> | |
| 146. |
Terylene is a condensation polymer of ethylene glycol and which acid? |
| Answer» <html><body><p> Terephthalic acid</p><br/><br/><p>Terylene is a <a href="https://interviewquestions.tuteehub.com/tag/condensation-19217" style="font-weight:bold;" target="_blank" title="Click to know more about CONDENSATION">CONDENSATION</a> <a href="https://interviewquestions.tuteehub.com/tag/polymer-1158585" style="font-weight:bold;" target="_blank" title="Click to know more about POLYMER">POLYMER</a> of <a href="https://interviewquestions.tuteehub.com/tag/ethylene-976061" style="font-weight:bold;" target="_blank" title="Click to know more about ETHYLENE">ETHYLENE</a> glycol and terephthalic acid and also called <a href="https://interviewquestions.tuteehub.com/tag/polyester-1158520" style="font-weight:bold;" target="_blank" title="Click to know more about POLYESTER">POLYESTER</a>.</p></body></html> | |
| 147. |
Nylon threads are made of |
| Answer» <html><body><p> Polyamide polymer</p><br/><br/><p>Nylon threads are polyamides. They are the condensation <a href="https://interviewquestions.tuteehub.com/tag/polymers-16104" style="font-weight:bold;" target="_blank" title="Click to know more about POLYMERS">POLYMERS</a> of diamines and <a href="https://interviewquestions.tuteehub.com/tag/dibasic-2056606" style="font-weight:bold;" target="_blank" title="Click to know more about DIBASIC">DIBASIC</a> <a href="https://interviewquestions.tuteehub.com/tag/acids-366963" style="font-weight:bold;" target="_blank" title="Click to know more about ACIDS">ACIDS</a>.</p></body></html> | |
| 148. |
Nylon is made up of : |
| Answer» <html><body><p> Polyamide</p><br/><br/><p>Nylon is a generic designation for a family of synthetic polymers, based on <a href="https://interviewquestions.tuteehub.com/tag/aliphatic-1973026" style="font-weight:bold;" target="_blank" title="Click to know more about ALIPHATIC">ALIPHATIC</a> or semi-aromatic polyamides. Nylon is a thermoplastic silky <a href="https://interviewquestions.tuteehub.com/tag/material-1089170" style="font-weight:bold;" target="_blank" title="Click to know more about MATERIAL">MATERIAL</a> that can be melt-processed into fibers, films, or shapes. It is made of <a href="https://interviewquestions.tuteehub.com/tag/repeating-622232" style="font-weight:bold;" target="_blank" title="Click to know more about REPEATING">REPEATING</a> <a href="https://interviewquestions.tuteehub.com/tag/units-1438468" style="font-weight:bold;" target="_blank" title="Click to know more about UNITS">UNITS</a> linked by amide links similar to the peptide bonds in proteins.</p></body></html> | |
| 149. |
Nylon is a type of |
| Answer» <html><body><p> Polyamide</p><br/><br/><p>Nylon is a <a href="https://interviewquestions.tuteehub.com/tag/generic-468117" style="font-weight:bold;" target="_blank" title="Click to know more about GENERIC">GENERIC</a> designation for a family of synthetic polymers, based on aliphatic or semi-aromatic <a href="https://interviewquestions.tuteehub.com/tag/polyamides-18618" style="font-weight:bold;" target="_blank" title="Click to know more about POLYAMIDES">POLYAMIDES</a>. Nylon is a thermoplastic silky material that can be melt-processed into fibers, films, or shapes. It is made of <a href="https://interviewquestions.tuteehub.com/tag/repeating-622232" style="font-weight:bold;" target="_blank" title="Click to know more about REPEATING">REPEATING</a> units linked by amide links similar to the peptide <a href="https://interviewquestions.tuteehub.com/tag/bonds-900666" style="font-weight:bold;" target="_blank" title="Click to know more about BONDS">BONDS</a> in proteins.</p></body></html> | |
| 150. |
The material known in commerce as Terylene is a |
| Answer» <html><body><p> Synthetic fibre</p><br/><br/><p>Terylene is the name for a synthetic polyester fibre. It is a synthetic polyester fibre or <a href="https://interviewquestions.tuteehub.com/tag/fabric-982562" style="font-weight:bold;" target="_blank" title="Click to know more about FABRIC">FABRIC</a> based on terephthalic <a href="https://interviewquestions.tuteehub.com/tag/acid-847491" style="font-weight:bold;" target="_blank" title="Click to know more about ACID">ACID</a>, characterized by <a href="https://interviewquestions.tuteehub.com/tag/lightness-1073770" style="font-weight:bold;" target="_blank" title="Click to know more about LIGHTNESS">LIGHTNESS</a> and crease resistance and <a href="https://interviewquestions.tuteehub.com/tag/used-2318798" style="font-weight:bold;" target="_blank" title="Click to know more about USED">USED</a> for clothing, sheets, ropes, <a href="https://interviewquestions.tuteehub.com/tag/sails-1193412" style="font-weight:bold;" target="_blank" title="Click to know more about SAILS">SAILS</a>, etc.</p></body></html> | |