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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 3101. |
4.If the rate of diffusion of A is 5 times that of B, what will be the density ratio of A andA) 1/25B) 1/5C) 25 |
| Answer» <p>The ratio of A and B is 1/25</p> | |
| 3102. |
4) Motion of a car on the straight road.Consider the motion of the tip of the minutes hand ofa length 'R' In half an hour itsM Displacement is 2R3) Displacement is 2R50.dock haning2) Distance covered sy1 Distance covered is 2 |
| Answer» <p>Displacement is 2R , , distance is circumference of. semicircle = πR </p> <p>distance would be 2πr</p> <p>how ? if distance is 2πR. then according to in half hour , minutes hand should complete full rotation ? </p><p>its incorrect , distance is πR . </p> <p>no</p> <p>now , tell me.. how your answer is coming 2πR ?? 2πR means full circumference , of complete circle. Check your answer.. correctly</p> <p>in half hour he completed 1 revolution</p> | |
| 3103. |
1) Name the natural calamity which iscaused due to excess of water.A) DroughtB) FloodC) EarthquakeD) volcanic eruptionE) of these |
| Answer» <p>flood is right answer</p> <p>flood is the answer of the following</p> <p>flood is the right answer</p> <p>flood is the correct answer </p> <p>Flood is the natural calamity which is caused due to the excess of water </p> <p>And also flood is the correct answer</p> <p>Flood is the right answer </p> <p>flood is right answer</p> <p>flood is the correct answer of the given question</p> <p>flood is correct answer of following question </p> | |
| 3104. |
6. What is the name given to the shape because of which fislAlamve one living organism that does not move and one nom.liecause of which fish are able to move in wove in waterfroand one ntoo much of resistance ? |
| Answer» <p>streamline body of fish.</p> | |
| 3105. |
The nutrients enable living Leganisms to build their bodies, to grow,repair damaged parts of their bodies rprovide the energy to carry out lifecesses. Nutrition is the mode of'ng food by an organism and itsahat are nutrientsWhat is rutulionwhat are ou toteaphs |
| Answer» <p>1.A substance that is needed to keep a living thing alive and to help it grow it is called nutrients</p><p>2.The food that you eat and the way that it affects your health is called nutrition.</p><p>3.A living thing that is able to feed itself using simple chemical substance such as carbon dioxide is called autotrophs</p><p>like karo</p> | |
| 3106. |
MULTIPLE CHThe lerm Taxonomy was coined bya) Thesphrastusb) A.P. de Candolled) Linnaeus |
| Answer» <p>The term taxonomy was originally coined byAugustin Pyramus de Candollein 1813</p><p>so 'b' is the right answer</p> <p>The term Taxonomy was coined by A. P. de Candolle</p> | |
| 3107. |
Demerits of metal. |
| Answer» <p>Earth’s crust, Aluminium is relatively soft, durable, lightweight, ductile and malleable metal. It acts as a good thermal and electrical conductor and is also fairly corrosion resistant. Plus, it is theoretically 100% recyclable without any loss of its natural qualities and remarkably nontoxic.</p><p>Disadvantages:It’s not particularly strong and is expensive compared to steel of the same strength.</p><p>Applications:Aluminium is almost always alloyed to improve its properties. It is commonly used in the transportation, construction and packaging industries.</p> <p>Advantages:Bronze is an alloy consisting mainly of copper but the addition of other metals (usually tin) produces an alloy much harder than plain copper. Bronze resists corrosion and metal fatigue better, and conducts heat and electricity, better than most steels.</p><p>Disadvantages:Bronzes are generally softer, weaker and more expensive than steel.</p><p>Applications:Bronze is widely used for springs, bearings, bushings, automobile transmission pilot bearings and is particularly common in the bearings of small electric motors.</p> <p>Advantages:Carbon steel’s main alloying constituent is carbon. Low carbon steel is the most common and cost effective form. It contains around 0.05–0.320% carbon and is malleable and ductile. Medium carbon steel contains between 0.30–0.59% carbon and balances ductility and strength with good wear resistance. High-carbon steel has 0.6–0.99% carbon content and is exceptionally strong, while ultra high carbon steel contains 1.0–2.0% carbon and can be tempered to great hardness.</p><p>Disadvantages:Low-carbon steels suffer from yield-point runout and mild steel has a relatively low tensile strength.</p><p>Applications:Medium carbon is used for large parts, forging and automotive components. High-carbon steel is used for springs and high-strength wires. Ultra high carbon steel is used for special purposes like knives, axles or punches.</p> | |
| 3108. |
6. (a) What happens when(i) ethanoic acid reacts with ethanol(ii) ethylene reacts with hydrogen gas in presence ofnickel catalyst.(b) The atomic number of chlorine is 17(i) Give its electronic configuration(ii) Draw the electron dot structure of chlorinemolecule. |
| Answer» <p>a)(i)Ethanoic acid reacts with ethanol in presence of conc. sulphuric acid to give an ester called Ethyl Ethanoate.</p><p>(ii)ethylene reacts with hydrogen gas in presence of Nickel to produce Ethane.</p><p>(b)(i) 1s2 2s2 2p6 3s2 3p5refer diagram for (ii)</p> | |
| 3109. |
3(a). What should be minimum acceleration of wall toavoid slipping of block?H 0.22kg |
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| 3110. |
Derive velocity -time relation of motion. |
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| 3111. |
untreated human excreta is a health hazard explain |
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| 3112. |
ll De the tormula of its phosphate?The atom of an element X contains 17 protons, 17 electrons and 18 neutrons whereas the atom of an elementY contains 11 protons, 11 electrons and 12 neutrons.(a) What type of ion will be formed by an atom of element X ? Write the symbol of ion formed. anian(b) What will be the number of () protons (ii) electrons, and (ii) neutrons, in the ion formed from X?1p(c) What type of ion will be formed by an atom of element Y ? Write the symbol of ion formed.d) What will be the number of () protons (i) electrons, and (ii) neutrons, in the ion formed from Y?a(a) What will be the number of (0 protons(e) What is the atomic mass of () X, and (i)Y ?( What could the elements X and Y be ? |
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| 3113. |
Taxales includes: |
| Answer» <p>sfuFFSs jhreg jlurwsfgu utr</p> | |
| 3114. |
1. State one limitation of a sundial.2. Name the parts of a simple pendulum.3. Give an example of a body having uniform and periodic motion, |
| Answer» <p>1:----Although theSundialis very simple to make and to use, it also has manydisadvantages. ASundialis no longer accurate after a month. This is because the obliquity of Earth causes the 'path' of the Sun to change over the months. The sameSundialcannot be used in two different places...</p> <p>Sundialis no longer accurate after a month. This is because the obliquity of Earth causes the 'path' of the Sun to change over the months. The sameSundialcannot be used in two different places.</p><p>2)metal Bob, rigid support, string</p> <p>PENDULUM BOBAsimple pendulumis defined to have an object that has a small mass, also known as thependulumbob, which is suspended from a light wire or string</p> <p>Q. Name the part of a simple pendulam. </p><p>solution</p><p>Apendulumconsists of only a few components including a length of string or wire, a bob or some type of weight and a fixed point. They can be used to prove that the planet rotates on an axis. Thependulumis a popular device used in watches and clocks.</p> <p>1.Sundialcan not be used after sunset or onacloudy day. They can also not be carried along to different places.Sundialcan not be used after sunset or onacloudy day.2.Apendulumconsists of only a fewcomponentsincluding a length of string or wire, a bob or some type of weight and a fixed point. They can be used to prove that the planet rotates on an axis. Thependulumis a popular device used in watches and clocks.3.Simple pendulum</p> <p>1.Sundialcan not be used after sunset or onacloudy day. They can also not be carried along to different places.Sundialcan not be used after sunset or onacloudy day2.pendulumconsists of only a fewcomponentsincluding a length of string or wire, a bob or some type of weight and a fixed point. They can be used to prove that the planet rotates on an axis. Thependulumis a popular device used in watches and clocks.3.Movement of hands of clock</p> <p> a simple pandulum is defined to have an object that has a small mass also known as the pendulum Bob which is suspended from a a light wire or string</p> <p>uniformmotion is ex: moving the earth</p> | |
| 3115. |
2, A bus deereases its speed from80 km h to 60 km h in 5 sFind the acceleration of the bus. |
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| 3116. |
6. Give the preventive measures offollowing diseases.a. Dengue.b. Cancer.c. AIDS. |
| Answer» <p>For Dengue;PreventionExclusion from childcare, preschool, school or work is usually not necessary but people experiencing fever from dengue infection should not be in an environment where they may be bitten by mosquitoes. If this is not possible they should stay at home until they have no fever and are therefore no longer infectious (usually 3 to 5 days).There is no vaccine to prevent human infection by this virus.Personal protection and the environmental management of mosquitoes are important in preventing illness.Prevent access of mosquitoes to an infected person with a fever.Protect yourself from mosquito bites at all times in dengue areas. For tips on how to protect yourself, see Fight the Bite.</p> <p>Cancer Prevention:Don't use tobacco. Using any type of tobacco puts you on a collision course with cancer. ...Eat a healthy diet. ...Maintain a healthy weight and be physically active. ...Protect yourself from the sun. ...Get immunized. ...Avoid risky behaviors. ...Get regular medical care.</p> <p>HIV Prevention:There is presently no vaccine to prevent contracting HIV. The best way to protect yourself from the consequences of HIV and AIDS is to avoid being contaminated by the virus. The following precautionary measures are recommended to reduce the risks of contamination:</p><p>use a condom during sexual intercourse (vaginal, anal or oral);avoid sharing syringes;use disposable gloves when at risk of direct contact with blood;for HIV positive women, consider giving birth by caesarian section;for HIV positive women who are new mothers, consider feeding your baby with formula instead of breastfeeding;</p> | |
| 3117. |
. Discuss tle dlCTCIIO09. What is the time taken by the train running at a speed of 30 m/s to cross a man standing on the platform, thelength of the train being 480 m? |
| Answer» <p>Speed of train = 30m/sLength of train = 480mDistance = speed x timeThus time taken by train to cross the man= length of train / speed of train= 480/30= 16 sec </p> | |
| 3118. |
31.Starting from the orgin, a body oscillatessimple harmonically with a period of 2s. Afterwhat time will its kinetic energy be 75% ofthe total energy?(AIEEE-2006) |
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| 3119. |
convert the 80 km/h into m/s |
| Answer» <p>km to m =1000mand hour to second is 60*60=3600sechence80km/hr=80*1000/3600=22.22m/sec</p> | |
| 3120. |
Name any two effects of electric current. |
| Answer» <p>Electric current has the following two effects:</p><p>(i) Electric current can give rise to heating and lighting.</p><p>(ii) Electric current can convert a straight conductor into a temporary magnet.</p> <p>magneticheating. </p> | |
| 3121. |
the difference between the maximum number of electrons that can be accommodated in 2nd and 3rd shell of an atom is: |
| Answer» <p>★Calcium is a S- block element . ( atomic number 20 )elements which have their last electron filled in the S subshell are called Sblock element .</p><p>★What u r saying is that when the 3rd shell can accommodate 18 electrons then why Calcium has 2,8,8,2 configuration .The Reason - ★Aufbau's Principle - Electrons dont fill continuously in a shell , they fill in subshells first , each shell has respective subshells .★ 1 st Shell has 1 subshell named S .( s can accommodate 2 electrons at MAX.)★2nd Shell has 2 subshell named S,P( P CAN accommodate 6 ELECTRON AT MAX)★3rd Shell has 3 subshell S,P and D.(D CAN ACCOMMODATE 10 ELECTRON AT MAX )and so on...★ Now the subshells are filled in this order I have shown in the picture .So , before the 3rd Shell is fully filled , 4th shell starts to fill after 3p subshell .HENCE AS only 3s and 3p are filled in Calcium from the 3 rd shell it has this configuration .</p><p>Overall : the formula gives the number of electrons in shell.but electrons fill subshell wise in an elements electronic configuration.</p><p>Electrons are filled by the (n+l) rule , n is the shell number and l is the subshell .</p><p>For S subshell , l = 0P subshell l = 1D subshell l = 2</p><p>the lower value of n+l fills first.if 2 values of n+l are same then the one with lower shell number is filled first</p> <p>Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that thenth shell can in principle hold up to 2(n2) electrons.[1]Since electrons areelectrically attractedto the nucleus, an atom's electrons will generally occupy outer shells only if the more inner shells have already been completely filled by other electrons. However, this is not a strict requirement: atoms may have two or even three incomplete outer shells. (SeeMadelung rulefor more details.) For an explanation of why electrons exist in these shells seeelectron configuration</p> <p>2nd shell hold 8 electron3rd shell hold 18 electron</p> <p>2nd shell 8 electrons and 3rd shell 18 electrons and the maximum number of Electrons in each shell in 2n2</p> | |
| 3122. |
15. A person is standing on a weighing machine placed onunumöfmvelocitythe floor of an elevator. The elevator starts going upwith some acceleration, moves with uniform velocity fora while and finally decelerates to stop. The maximunmand the minimum weights recorded are 72 kg and 60 kg.Assuming that the magnitudes of the acceleration andthe deceleration are the same, find (a) the true weightof the person and (b) the magnitude of the acceleration.Take g = 9.9 m/sg/10 |
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| 3123. |
ii What are the units of measuring temperature? |
| Answer» <p>measuring unit of temperature are Kelvin , centigrade and fahrenheit</p> | |
| 3124. |
xercisesA 0.24 g sample of compound ofby analysis to contain 0.096 g of boron and 0.144 gof oxygen.Calculate the percentage composition of the compound byweight.oxygen and boron was found |
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| 3125. |
write 80 words about Position of eye while measuring length |
| Answer» <p>Orient your line of sight directly above the measurement marking on a ruler or similar device so that an imaginary vertical line connects your eye, the marking and the object. Place your eye at the level of the appropriate measurement marking when measuring the level of a liquid in a graduated cylinder. </p> | |
| 3126. |
Which of the following structure helps to differentiate between prokaryotes, plants and animals?(a) Ribosomes(c) Cell wall1.(b) Centriole(d) Vacuole |
| Answer» <p>cell wallit is found only in plants.</p> <p>Cell wall is the right answer</p> | |
| 3127. |
1. State similarities and differences between the laboratory thermometerand the clinical thermometer. |
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| 3128. |
Exercises1. State similarities and differences between the laboratory thermometerand the clinical thermometer.of conductors and insulators of heat. |
| Answer» <p>clinical thermometer can be use for measuring body temperature whereas laboratory thermometer can't be used for the purpose of measuring body temperature</p> | |
| 3129. |
5. The process of converting encrypted data back into its original form, so that it canbe understood |
| Answer» <p>Decryption isthe process of converting encrypted data back into its original form, so it can be understood.</p> <p>Decryption is the process of converting encrypted data back into its original form. </p> <p>decryption is the process of converting encrypted data back into its original from it is the correct answer</p> <p>description is the process of converting data back into its original form... </p> <p>Decryption is the process of covering encrypted data back into its original form.</p> | |
| 3130. |
40. The radioactivity isotope X with a half life of 10 years decays to Y which is stable. Asample of rocks was found to contain both the elements X and Y in the ratio 1:7. Whatis the age of the rocks ? |
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| 3131. |
Questioll. Namartificial satellite that was launched and give its approximate dimensions |
| Answer» <p>Sputnik 1launched 60 years ago. </p><p>The Soviet Union successfully launched the world's first artificial satellite into orbit around the Earth on Oct. 4, 1957.</p> | |
| 3132. |
B has two isotopes 10B (19%) and 11B (81%). The atomic mass of B is(1) 10.81(3) 1127,IS(2) 105(4) 10.5 |
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| 3133. |
Us7. What is transference of heat ? Explain the different ways of transference of heat. |
| Answer» <p>Heat is transfered via solid material (conduction), liquids and gases (convection), and electromagnetical waves (radiation). Heat is usually transfered in a combination of these three types and seldomly occurs on its own. For example, the thermal environment of a building is influenced by heat fluxes through the ground (conduction), and the building envelope (mostly convection and radiation).</p> | |
| 3134. |
Linear motion Defnition! |
| Answer» <p>Linear motion (also called rectilinear motion) is a one-dimensional motion along a straight line, and can therefore be described mathematically using only one spatial dimension.</p> <p>Linear motion is a one-dimensionalmotionalong a straight line, and can therefore be described mathematically using only one spatial dimension</p> <p>linear motion is a one dimensional motion along a straight line , and can therefore be described mathematically using only one spatial dimension</p> <p>Linear motion(also called rectilinearmotion) is a one-dimensionalmotionalong a straight line, and can therefore be described mathematically using only one spatial dimension. ... Themotionof a particle (a point-like object) along a line can be described by its position , which varies with (time).</p> <p>Linear motion(also called rectilinearmotion) is a one-dimensionalmotionalong a straight line, and can therefore be described mathematically using only one spatial dimension. ... Themotionof a particle (a point-like object) along a line can be described by its position , which varies with (time).</p> | |
| 3135. |
20. What are fundamental particles? |
| Answer» <p>In particle physics, an elementary particle or fundamental particle is a subatomic particle with no substructure, thus not composed of other particles.</p> | |
| 3136. |
How the modern methods of irrigation are more water-efficientthanthetraditionalones |
| Answer» <p>The modern methods of irrigation are • Drip Irrigation• Sprinkler system</p><p>The modern methods of irrigation are better than traditional methods because it saves more water and also reduces the time and labour. This is why people prefer modern methods on traditional methods of irrigation.</p> | |
| 3137. |
What is random motion |
| Answer» <p>TheRandom Motionbehavior animates the position of an object and makes that object move around the canvas along arandompath. ... Although themotioncreated with this behavior appears to berandom, it's predetermined by the group of parameters you've chosen.</p> | |
| 3138. |
1. How can you say water isnecessary, for us? |
| Answer» <p>Water is one of the most important substances on earth. All plants and animals must have water to survive. If there was no water there would be no life on earth. Apart from drinking it to survive, people have many other uses for water.</p> | |
| 3139. |
(How did the first world war help in the growth of the National Movementin India) |
| Answer» <p>The first world war created a new economic and political situation.# It led to a huge increase in defence expenditure which was financed by war loans and increasing taxes : customs duties were raised and income tax introduced.# Through the war years prices increased leading to extreme hardship for the common people.# Villagers were callled upon to supply soldiers and the forced recruitment in rural areas caused widespread anger.# Crops failed in many parts of India, resulting in acute shortage of food.# This was accompanied by an influenza epidemic.# 12 to 13 million people perished as a result of famines and the epidemic.</p> | |
| 3140. |
we see the sun rising 81/4minutes after it has actually risen why? |
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| 3141. |
With the helpofa flowchart, show how the exchange of gases takes place in the lungs |
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| 3142. |
With the help of a flow chart, show how the exchange of gases takes place in the lungs |
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| 3143. |
Name the two inventions that brought about revolutions in the field of transport |
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| 3144. |
diagnosis of cancer is known as |
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| 3145. |
Give reason why:(a) copper metal is used for making electric wires. |
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| 3146. |
Q.D. Why do you think electric wires are made out of copper silver is a betterconductor of electricity. |
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| 3147. |
5. Can electric wires be covered with aluminium foil instead of rubber or PVC ? Give reasons in supotyour answer. |
| Answer» <p>No u cant use a aluminium for covering becaus aluminium is a good conductor of heat n electricity which may become dangerous for us to use it in domestic appliances</p> <p>reasons</p> | |
| 3148. |
Short questions:-Q1) Why do you think electric wires are made out of copper silver is a better conductor of ?electricity |
| Answer» <p>silver is much costlier than copper and although silver is a best conductor electricity.copper is used</p> | |
| 3149. |
A sum of 500 is in the form of denominations of *5 and 10. If the total number of notes is 90, fnumber of notes of each typethe man will be three times as old as his son. Fin |
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| 3150. |
ledets Battery |
| Answer» <p>A Battery is a device consisting of one or more electrical cells that convert chemical energy into electrical energy.</p> | |