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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 5001. |
Example of monovalent trivalent divalent elements |
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Answer» Illustrated GLOSSARY of Organic CHEMISTRY - Monovalent. Monovalent: An ATOM having just one covalent bond. In this molecule the hydrogen atom and chlorine atoms are monovalent, the OXYGEN atom is DIVALENT, the nitrogen atom is trivalent, and the carbon atom is tetravalent. |
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| 5002. |
Riya does an activity to research which soil type is best for gram and rice plantation. She planted seedlings from both plants in different soil types and took good care of all the plants for about a month. She recorded the development of the plants as shown in the table. Which of these statements supports the performed activity? * |
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| 5003. |
Which of the following does not cause soil erosion? a Floods b Soil grazing c Fragmentation of rock d Deforestation |
| Answer» FRAGMENTATION of rockfollow me | |
| 5004. |
Explain the action of HCl on following substances a) Zinc b) CaCO3 |
| Answer» CACO3 HOPE it can HELP you | |
| 5005. |
Find the molecular mass or formula unit mass ofmgcl2h=1 |
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Answer» ar mass add all the MASSES of the given compound...so the mass of the FOLLOWING element:MG= 24cl=35×2= 70h=2Explanation:So,OVERALL will be......70+24+2= 96u will be the MOLECULAR mass of the given compound........ |
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| 5006. |
Write the chemical name of: (i) Ca(NO3)2(ii) (NH4)2SO4(iii) Hgo(iv) CuCozBe fast I have to submit please please please please please please please pleaseNO SPAM |
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Answer» tion:1. Calcium NITRATE 2. Ammonium Nitrate 3. Mercuric OXIDE4. CORRECT your question.....Hope it helps you ‼️ |
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| 5007. |
(b.)what will be the loss in mass when 42g of magnesium carbonate is strongly heated to give magnesium oxide ? |
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Answer» MgCO 3 →MgO+CO 2 Molecular WEIGHT of MgCO 3 = 24 + 12 +16 x 3 = 84Molecular weight of MgO= 24 + 16 = 40On HEATING 84 gms of MgCO 3 the quantity of MgO obtained= 40 gms∴ On heating 5 gms of MgCO 3 the quantity of MgO obtained= 8440 X5gms= 2.38 gmsExplanation:......Hope it helps you ‼️ |
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| 5008. |
Give two examples of application of nanotechnology in cosmetics?(chemistry) |
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Answer» tion:TITANIUM DIOXIDE and zinc OXIDE NANOPARTICLES in sunscreenTitanium dioxide (TiO2) and zinc oxide (ZnO) minerals are often UTILIZED in sunscreens as inorganic physical sun blockers owing to their absorption of light in the UV range. |
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| 5009. |
Calculations (Relative atomic masses: Mg=24, C=12, O=16)2. (a.) calculate the mass of magnesium oxide formed when 12 g ofmagnesium is heated in oxygen. |
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Answer» gnesium (Mg) and Oxygen (O) combine in the ratio = 3:2 to FORM compound MAGNESIUM oxide (MgO). It follows Law of Constant proportions. • 3G of Mg COMBINES with = 2g of O. • 12g of Mg combines with = 2 × 12/3 = 8g of O. |
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| 5010. |
Pecess 1. plants preparetheir food by(called phoes ynthesis. Can we call photosynthesa chemical change? Explainis |
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Answer» YaExplanation:Because the FOOD PREPARED by them can't be REVERSED |
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| 5011. |
EFFECTS OF HEAT ON MATTER When heat is supplied to a substance, it goes through various changes. Let's discuss them in detail.Change in states of matter• Thermal expansion• Chemical changeChange in State of MatterMatter can be changed from one state to the other by supplying or removing heat energy. On heating,che molecules of matter move rapidly. Due to their continuous movement, they change from one stateo another. All the three states of matter are interconvertible. Let's understand this using water as anexample.+heat+heat-heat-heatsolidoHOPE THIS IS HELP FOR YOU IN YOUR CHEMISTRY QUESTIONSTHANK YOU |
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Answer» is it QUESTION / ANSWEREXPLANATION: |
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| 5012. |
1. plants Prepare their foodfood by processcalled photosynthesiscan we call photosynthesisis a cemical change?explain |
| Answer» PLANT MAKE their FOOD by PHOTOSYNTHESIS ।। | |
| 5014. |
In which of the following pairs, which numbers is to the right of the other number line? a) 2, 9b) -3, -8c) 0, -1 Solve step by step plzz do fast.... |
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Answer» a ) 9 B ) -3C ) 0Explanation:PLEASE mark me as brainliest and please follow meHope u like my answer |
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| 5015. |
Where is nylon fibre used ?(chemistry) |
| Answer» USES of Nylon:Less frequently encountered uses include FLAK vests, PARACHUTES, combat uniforms and life vests; the fiber is also often used in manufacturing umbrellas, LUGGAGE and the netting for BRIDAL veils. | |
| 5016. |
Question Write down any 2 characteristics of chemical change. |
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Answer» Some signs of a chemical CHANGE are a change in COLOR and the FORMATION of BUBBLES. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, ODOR change, temperature change. |
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| 5017. |
Who is the father of chemistry answer and follow me also |
| Answer» ANTOINE LAVOISIER Explain:Father of Chemistry: Most Common Answer If you are asked to identify the Father of Chemistry for a homework ASSIGNMENT, your best answer probably is Antoine Lavoisier. Lavoisier WROTE the book Elements of Chemistry (1787). | |
| 5018. |
In the given equation for the formation of aluminium sulphide by heating a mixture of aluminium and sulphur 2Al+ 3S → Al2S3how many gram of sulphur is needed if 150g aluminium reacts with it to form 245g Al2S3? |
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Answer» Aluminum sulfide or aluminium SULPHIDE is a chemical COMPOUND with the FORMULA Al2S3.Explanation:Plz follow me |
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| 5019. |
What are the element which cannot be kept open and in which it is kept |
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Answer» here is your answerExplanation:HOPE it HELPS YOUPLEASE mark as brainliest plzzzzzzz and FOLLOW me |
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| 5020. |
When did Harrapan cities develope |
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Answer» Explanation:The Harappan Civilisation has its earliest roots in cultures such as that of MEHRGARH, approximately 6000 BC. The two greatest cities, Mohenjo-daro and HARAPPA, emerged circa 2600 BC along the Indus RIVER valley in PUNJAB and Sindh. Periods: Harappa 1 to Harappa 5 Location: Sahiwal District, Punjab, Pakistan |
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| 5021. |
22 number of protons remains constant in all isotopes of hydrogen because (1 Point) 1.Atomic number and mass number of isotopes remain same 2.Atomic number of isotopes remain same but mass number differ 3.mass number of isotopes remain same but atomic number differ 4.both atomic number and mass number of isotopes differ |
| Answer» OPTION 2 is CORRECT ANSWERS of this QUESTION | |
| 5022. |
Example of physical change |
| Answer» MELTING of wax, boiling of water, FREEZING of ICE. And many more... | |
| 5023. |
Question Write some uses of battery. pls,answer as soon as possible |
| Answer» HOPE it HELPS PLEASE FOLLOW me | |
| 5024. |
write the steps you would use for making tea. use the words solution, solvent ,solute, dissolve, soluble, insoluble, filtrate and residue |
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Answer» this ur answer plz accept my freind requestExplanation:Use the words solution, solvent, SOLUTE, dissolve, soluble, insoluble, filtrate and residue. Answer: (i) Tea can be PREPARED by following steps:Take 100ml of WATER as solvent and boil it few minutes. (ii) Now add one tea spoon sugar, one tea spoon tea leaves and 50ML of MILK. |
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| 5025. |
Getting bored...... someone tell me what should I do????????........ |
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| 5026. |
The intencity hyderbad witnessed incessint rainfall like never before.many people lost their lives andmany were rendered homeless anda lot of damage was caused.imagine that you are a news reporter who happened to visit Hyderabad write report in the distraction caused and the rescue operations conducted by head office. |
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Answer» Telangana, normal life has been thrown out of gear in several parts of the state INCLUDING the capital city, Hyderabad due to incessant heavy RAINS. Hundreds of people from low lying areas have been shifted to relief centres in Hyderabad as storm water flooded their houses. At some places, GROUND floor and even first floor inundated as water water-loggings occurred at many places. A RED category warning has been sounded in Hyderabad following many reservoirs in and around the capital city receiving flood water to their brims.Rivers and rivulets are on spate and streams are overflowing at many places in the state. People have been advised not to venture out, especially to close to water bodies. Met officials warned that heavy to very heavy rains are likely to occur across the state due to the deep depression which is moving 50 kilometres from Hyderabad. Vehicular traffic on the highway between Andhra Pradesh and Telangana moving at a snail’s pace due to waterlogging at many places.Meanwhile, Hyderabad, Yadadri Bhongiri, Medchal Malkajgiri districts received very heavy rainfall Hyderabad recorded one of the highest rainfall measures in the last HUNDRED years, during the past 24 hours. Ghatkesar in Medchal Malkajgiri district near Hyderabad received 32.4 centimetres of rainfall. Over 20 to 30 places in Hyderabad received over 20 cms of rainfall during the same time.Disaster Management Teams of Greater Hyderabad Municipal Corporation are struggling to rescue and shift people from low-lying areas to relief centres and several teams are working on clearing water loggings from the main roads. Several incidents of felling of trees and electricity polls reported and electricity supply disrupted to many residential areas. Municipal Administration Minister K. Tarka Ramarao is monitoring the situation from the GHMC Control Room in Hyderabad.Explanation:hope it will help youmark me as brillianist |
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| 5027. |
17.. Melting of ice is an exothermic irreversible chemical change.( correct the false statement) |
| Answer» MELTING of ICE is a REVERSIBLE change.here is your ANSWER. | |
| 5028. |
What is the action of HCL on zinc |
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Answer» nc reacts with hydrochloric ACID, the reaction bubbles vigorously as hydrogen gas is produced. The production of a gas is also an indication that a chemical reaction is OCCURRING. Zinc REACTING with hydrochloric acid PRODUCES bubbles of hydrogen gas. |
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| 5029. |
A physical change is a options a) temporary change b) permenent change c) temporary change with reversed d) none of these |
| Answer» OPTION (C) HOPE this HELPS yousame here DEVIL | |
| 5030. |
How are the given cells X and Y different from each other? State one differenceIXY |
| Answer» PLEASE MAKE BRAINLIEST please REQUEST a | |
| 5031. |
Electric confugration of holium |
| Answer» ELECTRONS Explanation:PER shell: 2,8,18,29,8,2Atomic NUMBER: 67Symbol: HO | |
| 5032. |
15. There is high diffusibility in ____ |
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| 5033. |
Write the atomic number of the element present in the third period |
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Answer» The ELEMENT present in THIRD PERIOD and seventeenth group of the PERIODIC table is ChlorineAtomic number of Chlorine is 17. |
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| 5035. |
Convert 12.044×10²³ number of the atoms into moles |
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Answer» tion:12.044×10²³ /Na=12.044×10²³/6.022×10²³=2 MOLES |
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| 5036. |
(a) There are50 paise coins in $1 |
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Answer» pls write a PROPER QUESTION then I'll ANSWER it in the BEST way it is a SHORT question ji |
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| 5037. |
If an atom has atomic number 20 and mass number 40.the number of valence electron possess it |
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Answer» 2Explanation:No of ELECTRONS =20 K. L. M. N2. 8 8. 2So no of valence electrons is 2 |
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| 5038. |
7. The force of attraction between theparticles is very week in ___(example) |
| Answer» CE of ATTRACTION is very WEEK in GAS | |
| 5039. |
Chemical change involve options a) change of state only b) change of colour only c) change in state as well as composition |
| Answer» CHANGE in STATE as WELL as its COMPOSITION. | |
| 5040. |
Question Who discovered magnetic effect of current? |
| Answer» HANS CHRISTIAN orstedsMark me as BRAINLIEST ❤️ | |
| 5041. |
6. Find the calorific value of a fuel in J/Kg, which produces 900 cal of energy on burning 5 g of a fuel.1M |
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Answer» Goutel suggested the following formula from calculating the higher calorific value when the percentage proximate analysis of fuel is KNOWN. The formula is, CAL. value = 343.3 x fixed CARBON % + α x % volatile matter kJ/kg.Explanation:plz FOLLOW me |
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| 5042. |
A chemical change involves |
| Answer» CHEMICAL REACTIONS involve breaking chemical bonds between reactant MOLECULES (particles) and forming NEW bonds between atoms in product particles (molecules). The number of atoms before and after the chemical change is the same but the number of molecules will change. | |
| 5043. |
What is monoatomicl |
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Answer» Monatomic is a combination of two words “mono” and “ATOMIC” means a SINGLE atom. This TERM is used in both Physics and Chemistry and is applied to the gases as a monatomic GAS. ... The noble gases are monatomic gases as they are unreactive in nature which is a property of these gases. |
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| 5044. |
5 Which of the following element attain stable electronic configuration as neon by donating or accepting electrons from/in the outermost shell (1 Point) |
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Answer» Oxygen atom ATTAINS stable electronic configuration of nearest noble gas-Neon by ACCEPTING TWO electrons in its valence shell and becomes positively CHARGED oxide ion.Explanation:please Follow me |
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| 5045. |
Chemical changes are the result of absorption release options a) heat energy only b) light energy only c) sound energy only d) some kind of energy |
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| 5046. |
Fill in the blanks 2. Sublimation isstate of matter ____change of.a) considered b) not considered |
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| 5047. |
which of the following expresson has prime factors option are 24=2x3x4, 56=7x2x4, 70=2x5x7, 54=2x3x9 |
| Answer» EXPRESSION that has PRIME FACTORS is the 3RD option.Explanation:70=2x5x7 | |
| 5048. |
(a) Can the process of rusting be called combustion? Also give reason in support of your answer. (b) |
| Answer» CESS of rusting can be CALLED COMBUSTION because of combustion is a chemical process in which a combustible substance REACTS with oxygen to produce heat and light WHEREAS in rusting, a metal reacts with oxygen to produce metallic oxide. | |
| 5049. |
If you are suffering from acidity , then you should take an antacid. Which two bases could antacid contain ? plz help me for my exam |
| Answer» MAGNESIUM HYDROXIDE, gelusil | |
| 5050. |
Poisonus mustardmustard gas is right answer is Liquid |
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Answer» Mustard gas is a clear AMBER COLORED oily LIQUID with a faint odor of mustard/garlic. It is not readily combustible. Its vapours are HEAVIER than air, are very toxic, and can be absorbed through the skin. The effects from exposure to the material include blindness which MAY be delayed. |
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