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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.
| 4351. |
Write the advantages of alloying? |
| Answer» <p>When a metal is mixed with another element, which may be a metal or a non metal such that a new substance of homogeneous composition is obtained, it is known as alloying and the substance is known as an alloy. An alloy is thus a homogeneous mixture of two or more metals, or a metal and a non metal. Example stainless steel, duralumin etc. An alloy is a combination of metals. The advantage of alloying is that it enhance certain properties like strength, ductility, resistance to corrosion, durability etc to fit better the uses they have been designed for. The advantage of alloys over pure metals is the ability to combine the best properties of multiple metals. For e.g. steel is more harder than pure iron,. more resistant to corrosion.Examples:Brass - Copper and zincBronze - Copper and TinSolder - Tin and lead</p> | |
| 4352. |
Write the chemical equations whenon dioxide gas is passed through lime water:3()In small amount |
| Answer» <p>When carbon dioxide is passed through lime water which is a diluted solution of Ca(OH) 2, it turns milky due to the formation of calcium carbonate which is CaCO3.</p><p>The reaction is like this:</p><p>Ca(OH) 2 + CO2 → CaCO3 + H2O</p><p>If you pay a little more attention, you will be able to observe that it is a neutralization reaction, where base is Ca(OH)2 and acid is H2CO3 and a salt CaCO3 and H2O are formed.</p><p>So, actually the above reaction is a short form of actual reaction.</p><p>Actually CO2 is no more CO2 after dissolving in water, it becomes H2CO3 via addition reaction as shown :</p><p>CO2+H2O→ H2CO3</p><p>Now, this CaCO3 is insoluble in water which is the reason behind the milkiness of solution.</p><p>Hit like if you find it useful!</p> | |
| 4353. |
what is loading? Give example |
| Answer» <p>the application of a mechanical load or force to something.example"the branches of a tree diminish in cross section according to their loading"</p> | |
| 4354. |
On selling a calculator for1325, a man gains 6%. For how much should he sell it to gain 12% |
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| 4355. |
1. THow does the force of gravitation between two objects changewhen the distance between them is reduced toalf ? |
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| 4356. |
explain 5 layers of atmosphere |
| Answer» <p>Earth'satmosphereis divided intofivemainlayers: the exosphere, the thermosphere, the mesosphere, the stratosphere and the troposphere. Theatmospherethins out in each higherlayeruntil the gases dissipate in space.</p> <p>Earth's atmosphere is divided into five main layers: the exosphere, the thermosphere, the mesosphere, the stratosphere and the troposphere. The atmosphere thins out in each higher layer until the gases dissipate in space. There is no distinct boundary between the atmosphere and space, but an imaginary line about 62 miles (100 kilometers) from the surface, called the Karman line, is usually where scientists say atmosphere meets outer space.</p> <p>Thetroposphereis the layer closest to Earth's surface. It is 4 to 12 miles (7 to 20 km) thick and contains half of Earth's atmosphere. Air is warmer near the ground and gets colder higher up.Thestratosphereis the second layer. It starts above the troposphere and ends about 31 miles (50 km) above ground. Ozone is abundant here and it heats the atmosphere while also absorbing harmful radiation from the sun.Themesospherestarts at 31 miles (50 km) and extends to 53 miles (85 km) high. The top of the mesosphere, called the mesopause, is the coldest part of Earth's atmosphere, with temperatures averaging about minus 130 degrees F (minus 90 C). This layer is hard to study. Jets and balloons don't go high enough, and satellites and space shuttles orbit too high.Thethermosphereextends from about 56 miles (90 km) to between 310 and 620 miles (500 and 1,000 km). Temperatures can get up to 2,700 degrees F (1,500 C) at this altitude. The thermosphere is considered part of Earth's atmosphere, but air density is so low that most of this layer is what is normally thought of as outer spaceTheexosphere, the highest layer, is extremely thin and is where the atmosphere merges into outer space. It is composed of very widely dispersed particles of hydrogen and helium.</p> | |
| 4357. |
Ir A and B are acute angles of a right angled triangle ABC such that sinA- cosB, find the value3 |
| Answer» <p>sinA = cosB</p><p>=>sinA = sin(90-B)</p><p>Hence, A =90-B =>A+B =90 </p> | |
| 4358. |
l. Fill in the blanks with suitable forms of 'doing'his work in time.1. He2. I could3. He may not recall but he4. I never said it,5. Does he hope to win? Yes, hethat work with great difficulty.show it.1?No, he |
| Answer» <p>he did his work in timeI could do that work with great difficultyhe may not recall but he did show itI never said it,did I?does he hope to win?Yes he does.No he does not.</p> | |
| 4359. |
9. An ornament weighing 36 g in air, weighs only 34 g inwater. Assuming that some copper is mixed with goldto prepare the ornament, find the amount of copper init. Specific gravity of gold is 19:3 and that of copper is8-9. |
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| 4360. |
Q.23 A thin copper wire of length /metre increases in length by2% when heated through 10°C. which is not thepercentage increase in area when a square copper sheet oflength / metre is heated through 10°C(1) 12% (2) 8% (3) 16% (4) 4% |
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| 4361. |
2Vinay riches his bicycle and covers adistance of 100m in 20 seconds. Calculate hisspeed |
| Answer» <p>5meter per second or 5m/s</p> <p>5m/ sec is the correct answer of the given question</p> <p>speed=distance/time100m/20s so ans is:- 5m/sec</p> <p>5m/sec is the best answer</p> <p>speed =distance/ time so 100m/20s=5m/second </p> <p>To find the speed the equations is distance /time =speed=100 m/20s=SO ANS IS 5m/sec</p> <p>distance=100mtime=20secspeed=distance×time =100×20 =2000m/sec</p> <p>distance=100mtime=20secspeed=distance/time =100/20 =5m/sec</p> | |
| 4362. |
Where do green plants get their food from? |
| Answer» <p>Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.</p> | |
| 4363. |
00You LSL LUSCIRCUS4. Give a brief description of the process of synthesis of food in green plants__.. . . .. that plants are the ultimate source of |
| Answer» <p>Photosynthesis is defined as the process in which the chlorophyll-containing plant cells synthesise food in the form of carbohydrates, using carbon dioxide and water in the presence of solar energy. Photosynthesis Sources of raw materials required for photosynthesis: (a) Water is taken in from the roots of the plant and is transported to the leaves. (b) Carbon dioxide from the air enters the leaves through the tiny pores called stomata and diffuses to the cells containing chlorophyll. (c) Solar energy is used to break water into hydrogen and oxygen. This hydrogen is combined with carbon dioxide to form food for the plants, which is ultimately used by the animals as well. Thus, photosynthesis can be represented by the following equation.</p> | |
| 4364. |
PHYSICS(26)en an object moves one complete circular path. What is the work dine 1 Watt of power. |
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| 4365. |
10.Which of the following seas is without a coastline ?(A) White sea (B) Saragasso sea(C) Sea of Okhotsk (D) Tasmania sea |
| Answer» <p>saragasso sea</p> <p>The only sea on Earth without a land boundary, the Sargasso Sea is bounded to the west by the Gulf Stream; on the north, by the North Atlantic Current; on the east, by the Canary Current; and on the south, by the North Atlantic Equatorial Current.</p><p>(B) is correct option </p> <p>B saragasso sea is the only sea in the world which is without a coastline. </p> | |
| 4366. |
Explain the transport of substances across the plasma membrane.Or, Write notes on(a) Passive transport2.2.(b) Active transport. |
| Answer» <p>The plasma membrane surrounding animal cells is where the exchange of substances inside and outside of cells takes place. Some substances need to move from the extracellular fluid outside cells to the inside of the cell, and some substances need to move from the inside of the cell to the extracellular fluid.</p><p>Some of the proteins that are stuck in the plasma membrane help to form openings (channels) in the membrane. Through these channels, some substances such as hormones or ions are allowed to pass through. They either are “recognized” by a receptor (a protein molecule) within the cell membrane, or they attach to a carrier molecule, which is allowed through the channels. Because the plasma membrane is choosy about what substances can pass through it, it is said to be selectively permeable.</p><p>Permeability describes the ease with which substances can pass through a border, such as a cell membrane. Permeable means that most substances can easily pass through the membrane. Impermeable means that substances cannot pass through the membrane. Selectively permeable or semipermeable means that only certain substances are able to pass through the membrane.</p><p>Transporting substances across the plasma membrane can require that the cell use some of its energy. If energy is used, the transport is called active. If molecules can pass through the plasma membrane without using energy, the molecules are using passive transport.</p><p>(a) Passive transport is a type of cellular transport where substances move along the concentration gradient. Since it is associated with downhill movement of substances (i.e. from an area of higher concentration to an area of lower concentration) it does not require a chemical energy.</p><p>(b) Active transport is the process by which dissolved molecules move across a cell membrane from a lower to a higher concentration. In active transport, particles move against the concentration gradient - and therefore require an input of energy from the cell. </p> | |
| 4367. |
A7. All the particles of a system are situated at a distance r from the origin.The distance of the centre ofmass of the system from the ongin is(A) = r(B)sr(C)> r(D) 2r |
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| 4368. |
1. Define the following(a) Exocrine glandb) Endocrine gland(c) Hormone |
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| 4369. |
4.Which of the following is a polyamide ?(1) Terylene(3) Nylon-6, 6(2) Buna-S(4) Polythene |
| Answer» <p>Examplesof naturally occurringpolyamidesare proteins, such as wool and silk. Artificially madepolyamidescan be made through step-growth polymerization or solid-phase synthesis yielding materials such as nylons, aramids, and sodium poly(aspartate)</p><p>The answer is option 3.</p> | |
| 4370. |
OBSERVATIONSS.No. .Angle of incidence (1) in degreeAngle of reflection () in degree-___1.93.4. |
| Answer» <p>What is your exact question?</p> | |
| 4371. |
1 Differentiate between the following1. Breathing and cellular respiration.J. Inhalation and exhalation2. Aerobic respiration and anaerobic respiration |
| Answer» <p>Breathingis the physical process where you inhale and exhale air in and out of your lungs. ...Respirationis a chemical reaction where Oxygen is used to breakdown Glucose in order to generate energy which is then used by thecellto function.</p> | |
| 4372. |
2. Differentiate between the following:(a) Breathing and cellular respiration(c) Aerobe and anaerobe A(b) Inhalation and exhalation(d) Respiration in animals and in plants |
| Answer» <p>a)Breathingis the physical process where you inhale and exhale air in and out of your lungs. ...Respirationis a chemical reaction where Oxygen is used to breakdown Glucose in order to generate energy which is then used by the cell to function.</p> <p>b)Inhalationis the process of intake of air into lungs, whereasexhalationis the process of letting air out from lungs. ... Due to the effect of intercostal muscles rib cage moves upward and outward ininhalation, while inexhalationthe rib cage moves downward.</p> <p>c)Almost all animals and humans are obligateaerobesthat require oxygen for respiration, whereasanaerobicyeast is an example of facultativeanaerobebacteria. Individual human cells are also facultativeanaerobes: They switch to lactic acid fermentation if oxygen is not available.</p> <p>breathing :- it is the physical process of exchange of gases. it occurs outside the cells .No energy is released.cellular respiration:- it is chemical process in which food molecules are broken down into carbon dioxide and water. it occurs inside the cells. energy is released.</p> | |
| 4373. |
e hat this result is the converselthe TlultEXERCISE 7.3ARC and à DBC are rwe isosceles triangles onthe same hase BC and vertices A and D are on theA.sume side of BC isoe Fig. 739) IfAD is extendedii) APbusects 2 Aas well as 2 D.AP is the perpendiculur bisector of BC.Fig. 73 |
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| 4374. |
Find the radius of a circle whose circumference is 6.6 cm. |
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| 4375. |
The ratio between the curved surface and total surface of a cylinder is 1 :2. Find the volume of the cylinder, given that its total surface area is 616 cm2. |
| Answer» <p>Given, csa :tsa of cylinder = 1:2 2πrh/2πr(r+h) = 1/2 h/(r+h) = 1/2by cross multiplication, we get 2h = r+h 2h-h = rtherefore h=rby calculating, we get height is equal to radius. then ratio of their height andradius is height of cylinder : radius of cylinder = 1:1</p> | |
| 4376. |
6. A particle of mass 50 g moves on a straight line. Thevariation of speed with time is shown in figureFind the force acting on the particle at t-2, 4 and 6seconds.v (m/s)1510 |
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| 4377. |
mlFill in the blanks with the correct option:100 puro le tons 37 degree of hotness weight coldness 1001. The quantity of wheat produced by a farmer is expressed in2. One quintal -_lock-3. The lower fixed temperature in a Celsius thermometer is the melting point of4. Temperature is the measure ol o r_ of an object.5. The normal temperature of a human body is - ET C .6. Theof an object is measured with the help of a beam halance.7. Im = Le _cm. |
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| 4378. |
Write "True" or "False":1. Volume is the space occupied by a thing2. 1 litre is smaller than 1 millilitre3. Digital thermometers measure body temperature4. There are 100 centimetres in 1 metre.5. 1,000 kilomgrams make a ton. |
| Answer» <p>1. true2. false3. true4. true5. false</p> | |
| 4379. |
Calculate the molarity of a solution containing 9.8 gm of H SO.250cm3 of aqueous solution. |
| Answer» <p>Moles of solute = Mass of solute / Molar mass of solute= 9.8 g / 98 g/mol= 0.1 mol</p><p>Volume of solution = 25 cm³ = 0.025 Litres</p><p>Molarity = Moles of solutes / Volume of solution in litres= 0.1 mol / 0.025 litres= 4 M</p><p>Molarity of given solution is 4 M</p> | |
| 4380. |
Two heating elements of resistance R and R2 whenoperated at constant supply of voltage V, consume powerP, and P, respectively. Deduce the expressions for thepower of their combinations when they are connected inaeries connection |
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| 4381. |
3/13 ÷-4/65 |
| Answer» <p>3/13×65/4=15/4 answer</p> <p>-15/4 is the correct answer of the given question</p> <p>15 /4 is the correct answer</p> <p>15 _ 4it is answer</p> | |
| 4382. |
USE!Which one has toden 50 m long is 300 sqm. Find the width of the garknoulár plot of land 500 mlong andonThe area of a rectangular garden 50 mfriling a rectangular plot of land 500m |
| Answer» <p>let width of garden be xarea of rectangle=l×b50×x=300x=300÷50=6mhence width of garden is 6m</p> <p>width of the garden = area/ length = 300/50 = 6 m (ANS) </p> <p>width of the garden = area / length =300/50=6 m ( ANS)</p> | |
| 4383. |
2. Ice melts at 0°C. Water will freeze at(a) 0°C(b) 5°C(c) 50°C(d) 100°C |
| Answer» <p>(a)0℃ is the freezing point of water </p> <p>the correct answer is</p> <p>the correct answer is a)O C</p> <p>0°C is the right answer</p> <p>option A is correct 0°C</p> | |
| 4384. |
(a) 300 K(b) 573 K |
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| 4385. |
Convert the following temperatureto celsius scale:a. 300 Kb. 573 K |
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| 4386. |
1. Fill the missing word in the blankspaces in the following sla) Wind isair.b) Winds are generated due toheating on thIc) Near the earth's surfaceair rises up whereasair comes down.ld) Atr moves from a region ofpressure to a regionpressure.n to fnd out wind direction at a given place. |
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| 4387. |
Two masses m, and m2 are connected by a spring of spring constant k and are placed on a smoothhorizontal surface. Initially the spring is stretched through a distance 'd' when the system is releasedfrom rest. Find the distance moved by the two masses when spring is compressed by a distance 'dD-1. |
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| 4388. |
Figure (26-E1) shows a paddle wheel coupled to a massof 12 kg through fixed frictionless pulleys. The paddle isimmersed in a liquid of heat capacity 4200 J K keptin an adiabatic container. Consider a time interval inwhich the 12 kg block falls slowly through 70 cm(a) How much heat is given to the liquid? (b) How muchwork is done on the liquid? (c) Calculate the rise in thetemperature of the liquid neglecting the heat capacityof the container and the paddle.12 kg |
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| 4389. |
1.If a and b are integers, then is a/b an integer. Give examp |
| Answer» <p>a = 1, b = 2, but a/b = 1/2 = 0.5. 0.5 is not an integer. Hence the statement is false</p> <p>If a and b are integers, a/b is an integer only if a is divisible by b. </p> | |
| 4390. |
How would you confirm that colorless liquid given to you is pure water? |
| Answer» <p>A very easy solution is to take a sample ofcolourless liquidand put on stove if it starts boiling exactly at 100 ºC then it ispure water. Any othercolourless liquidsuch as vinegar always have different boiling point.</p> | |
| 4391. |
83,In a transistor configuration, β parameter is:(C(1cI (b)tio of nower |
| Answer» <p>(b) Beta parameter = IC/IB</p> | |
| 4392. |
25. . A solution of a substance X' is used for white washing.-1) Name the substance "X" and write its form ula2) Write the reaction of the substance X named with water. |
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| 4393. |
2. Diflerentiate between solid, liquid and gas. |
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| 4394. |
Tick ( the correct answer:(a) The reproductive part of a plant is the10. Tic(i) leaf(i) stem (iil roottv) flower(b)The process of fusion of the male and the female gametes is called(i) fertilisation (ii) pollination(ii) reproduction (iv) seed formation |
| Answer» <p>a)flowerb) reproduction</p> <p>a)flowerb) fertilisation</p> <p>flower ,fertilisation</p> | |
| 4395. |
Write a short note on the binary number system. |
| Answer» <p>Binary number. In mathemaics and digital electronics, abinary numberis anumberexpressed in the base-2numeral systemorbinary numeral system, which uses only two symbols: typically "0" (zero) and "1" (one). The base-2numeral systemis a positional notation with a radix of 2. Each digit is referred to as a bit.</p> <p>Binary no is digital language.Is represented in terms of "0"s and "1"s</p><p>For example 5 is in binary 0101</p> | |
| 4396. |
3)is a female reproductive part in flower.QU2). Write true or false. |
| Answer» <p>Each carpel includes anovary(where the ovules are produced; ovules are the female reproductive cells, the eggs), a style (a tube on top of theovary), and a stigma (which receives the pollen during fertilization).</p> <p>The carpel is the female reproductive organ of the flower.</p> | |
| 4397. |
6. hat is meant by acceleration duegrawity |
| Answer» <p>Theaccelerationwhich is gained by an object becauseof the gravitationalforce is called itsacceleration due to gravity. Its SI unit is m/s2.Acceleration due to gravityis a vector, whichmeansit has both a magnitude and a direction. Theacceleration due to gravityat the surfaceofEarth is represented as g.</p> <p>The acceleration which is gained by an object because of the gravitational force is called its acceleration due to gravity. Its SI unit is m/s2.</p> | |
| 4398. |
(ख) रासायनिक समीकरण देते हुए स्पष्ट कीजिए किक्लोरोबेन्जीन से निम्नलिखित यौगिकों को कैसेबनायेंगे:[4](i) बेन्जोन्।(ii) फोनोल(iii) डी०डी०टी० (iv) ऐनिलीन7- निलिदिन का PAC नाम लिखए: [1-1-1-1] |
| Answer» <p>option (ii) is the correct answer </p> <p>option 2. is correct</p> <p>option 2 is the answer</p> <p>option 2 is the answer </p> | |
| 4399. |
11. Which is a Natural fibre among thefollowing ?A) RayonB) NylonC) PolyesterD) Silk |
| Answer» <p>silk or rayon are natural fibers</p> <p>silk is a natural fibre</p> <p>veryvsimplebamswer is silk</p> <p> silk</p> <p>d silk 👌👌👌👌👌👌7👌👌👌👌👌👌👌👌👌👌👌👌👌👌👌👌👌👌</p> <p>Rayon is a natural fiber </p> <p>silk is the natural fibre</p> <p>Silk is the natural fibre </p> <p>Silk is a natural fibre.</p> <p>Silk is a natural fibre among all of these</p> <p>Silk is correct answer </p> <p>silk is the natural fibre</p> <p>silk is a natural fibre among the following.</p> <p>silk as it is obtained from silkworm and no chemical interfere</p> <p>Silk is a natural fibre</p> <p>silk are natural fibres </p> <p>silk is the correct answer </p> <p>silk is a natural fiber </p> <p>silk is natural fiber</p> <p>polyester is natural fibre</p> <p>silk is natural fibre .</p> <p>silk is natural fiber </p> <p>silk is a natural fibre</p> <p>silk is a natural fiber</p> <p>silk is the right answer</p> <p>Silk is a natural fibre because others are synthetic fibres</p> <p>Silk is a natural fibre among the following .If you think is is helpful answer like and comment it .</p> <p>d)Silk as it is made by silk worms...</p> <p>silk is natural fibre </p> <p>the answer is silk because it come from Silkworm</p> <p>silk is correct answer </p> <p>Silk is the natural fibre among the option because silk is obtained from silkworm and is natural</p> <p>silk obtained from animal and natural fibre is cloned animal and plant fibres</p> <p>silk is a natural fibre</p> <p>silk is correct answer</p> <p>The fibres which are obtained from plants and animals or other natural resources are called natural fibres. </p><p>The answer is Silk. Because, it is obtained from silkworms. </p> <p>silk and rayon is natural fibrea</p> <p>silk is the natural fibre ,so option d is correct</p> <p>silk is the natural fibre</p> <p>(D) is the best answer</p> <p>Silk is a natural fibre</p> <p>silk is natural fibre and all other are man-made</p> <p>silk is a natural fiber</p> <p>D.silk, silk is a maturalxfibre</p> <p>Silk is the right answer </p> <p>Silk is s natural fibre</p> <p>silk is right answer</p> <p>silk rayon are naturally fibres </p> <p>silk is a natural fibre among all.remaining are synthetic or man-made or artificial fibres.</p> <p>silk is the natural fibre is absolutely right answer</p> <p>silk is a natural fibre </p> <p>Silk is the natural fibre among them</p> <p>there are two answer of this question silk and rayon</p> <p>silk is a natural fibre</p> <p>option(d)silkis the right answer😎😎😎</p> <p> silk is the natural fibre among them...</p> <p>silk is the natural fibre among them</p> <p>d. correct answer of this question is Silk.</p> <p>silk is the natural fibre among the given options.</p> <p>silk is the natural fibre in these options</p> <p>D is a correct answer because silk is only fibre amoung A,B,C .rest all are artificial fibre</p> <p>silk is the natural fibre</p> <p>Silk is a natural fibres.</p> <p>silk and rayon is natural gass</p> <p>anser nu d is correct, silk is a natural fiber in the given ans </p> <p>option d silk is the right answer</p> <p>Silk is natural fibre .</p> <p>Silk is the correct answer</p> <p>silk is the answer of these question</p> <p>silk and rayon are natural fibers</p> <p>silk is a natural fibre among these. it's obtained from an insect.</p> <p>.silk is correct answer</p> | |
| 4400. |
2) Write the difference between food chain and food web.....eeE19*see*se |
| Answer» <p>Food web1. A multitude of networks showing the flow of energy2. An organism of higher level trophic feeds on a specific organism of lower trophic level3. Has a role in improving the adaptability and competitiveness of an organism.</p><p>Food chain1. A linear pathway showing the flow of energy.2. Has no effect on the adaptability and competitiveness of organisms3. An organism of higher level trophic feeds on a specific organism of lower trophic level</p> | |