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MCQOPTIONS
This section includes 6820 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 2501. |
Metal pipes carrying water sometimes burst in winter. The reason for this is that. . . . |
| A. | When water freezes, it expands |
| B. | metal shrinks more than water |
| C. | The outer part of the pipe contracts more than the inner part |
| D. | metal expands more than water |
| Answer» B. metal shrinks more than water | |
| 2502. |
What will happen if two soap bubbles of different diameter are brought into contact with each other by a tube? |
| A. | the size of both the bubbles will remain the same |
| B. | Small bubble and small and big bubble will get bigger |
| C. | The smaller bubble will become bigger and the bigger bubble smaller to get the same size. |
| D. | Both the bubbles will burst on contact |
| Answer» C. The smaller bubble will become bigger and the bigger bubble smaller to get the same size. | |
| 2503. |
What is approximately the surface tension of the Sun? |
| A. | 2000 K |
| B. | 4000 K |
| C. | 6000 K |
| D. | 8000 K |
| Answer» D. 8000 K | |
| 2504. |
What is meant by bio-magnification? |
| A. | rapid growth of cancer cells in the body |
| B. | Pesticides increase in organisms of progressive nutritional levels |
| C. | microscopic view of body parts |
| D. | a sudden increase in the number of members of a caste in a specific area |
| Answer» C. microscopic view of body parts | |
| 2505. |
Is it difficult to cook rice? |
| A. | at the top of the mountain |
| B. | at sea level |
| C. | under the mine |
| D. | the same anywhere |
| Answer» B. at sea level | |
| 2506. |
Rice gets cooked quickly in pressure cooker because . . . . . . |
| A. | steam out of it |
| B. | It does not allow heat energy to escape easily |
| C. | High pressure breaks down hard layer of rice grains |
| D. | high pressure increases the boiling point of water |
| Answer» E. | |
| 2507. |
Food cooks faster in a pressure cooker because of the increase in air pressure. . . . . . . . . . |
| A. | increases the specific heat |
| B. | reduces specific heat |
| C. | lowers the boiling point |
| D. | raises the boiling point |
| Answer» E. | |
| 2508. |
At what point is the Fahrenheit temperature twice the centigrade temperature? |
| A. | - 67°F |
| B. | - 12.3°F |
| C. | - 135°F |
| D. | - 160°F |
| Answer» C. - 135°F | |
| 2509. |
Household electrical devices are connected in such a way that . . . . . . . . |
| A. | equal current flowing through them |
| B. | He has the same voltage |
| C. | they consume more electrical energy |
| D. | They have negligible electrical energy consumption |
| Answer» C. they consume more electrical energy | |
| 2510. |
Bio-diversity is related to? |
| A. | variety of wildlife |
| B. | Trees found in forests - from different forms of plants |
| C. | From all kinds of animals and plants found in nature |
| D. | From all the plants found on earth |
| Answer» D. From all the plants found on earth | |
| 2511. |
In developing the photography plate . . . . . . |
| A. | Sodium thiosulfate is used as an oxidant. |
| B. | Free bromine is released. |
| C. | The light affected area gets oxidized quickly. |
| D. | It is kept in the developing solution until all the bromide is washed off. |
| Answer» E. | |
| 2512. |
An unknown gas dissolves rapidly in water. Red litmus turns blue in a gaseous aqueous solution. This gas also gives white fumes with hydrogen chloride. Is this an unknown gas? |
| A. | sulfur dioxide |
| B. | nitric oxide |
| C. | ammonia |
| D. | carbon monoxide |
| Answer» D. carbon monoxide | |
| 2513. |
What is the reason for the energy developed by the sun? |
| A. | Nuclear fission |
| B. | nuclear fusion |
| C. | combustion |
| D. | cosmic radiation |
| Answer» C. combustion | |
| 2514. |
Which of the following terms is not related to microwave ovens used in homes? |
| A. | magnetron |
| B. | electromagnetic waves |
| C. | Radio waves |
| D. | Bipolar heat |
| Answer» D. Bipolar heat | |
| 2515. |
A hot object gives off its heat in the form of heat radiation to its surroundings. On what does the rate of heat loss depend? |
| A. | at the temperature of the object |
| B. | at ambient temperature |
| C. | the difference between the temperature of the object and the surrounding |
| D. | at the average temperature of the object and the surroundings |
| Answer» D. at the average temperature of the object and the surroundings | |
| 2516. |
How is cooling done in the refrigerator? |
| A. | by frozen ice in the freezer |
| B. | by spontaneous expansion of compressed gas |
| C. | by evaporation of a volatile liquid |
| D. | none of these |
| Answer» D. none of these | |
| 2517. |
If the mass of the earth remains the same and the radius is reduced by 1%, then the value ofGat the surface of the earth is . . . . . . |
| A. | will increase by 0.5% |
| B. | will increase by 2% |
| C. | 0 . 5% will be reduced |
| D. | will be reduced by 2% |
| Answer» C. 0 . 5% will be reduced | |
| 2518. |
The tendency of a liquid to shrink and take up the minimum volume is due to the following property? |
| A. | surface tension |
| B. | viscosity |
| C. | density |
| D. | vapor pressure |
| Answer» B. viscosity | |
| 2519. |
Is energy produced from the sun? |
| A. | By volume |
| B. | by nuclear fusion |
| C. | By nuclear fission |
| D. | by oxygen |
| Answer» C. By nuclear fission | |
| 2520. |
When the speed of a moving object is doubled, its kinetic energy. . . . . . |
| A. | doubles |
| B. | quadruples |
| C. | remains the same |
| D. | increases three times |
| Answer» C. remains the same | |
| 2521. |
The scientist concerned with buoyancy is |
| A. | Archimedes |
| B. | newton |
| C. | Louis Pasteur |
| D. | all these |
| Answer» B. newton | |
| 2522. |
Who among the following told before Newton that all objects are gravitationally attracted towards the earth? |
| A. | Aryabhata |
| B. | varahamihira |
| C. | Buddhagupta |
| D. | Brahmagupta |
| Answer» E. | |
| 2523. |
When we sit on a seat with rubber mattress or lie down on the mattress, its shape changes. Is such a substance found in? |
| A. | kinetic energy |
| B. | potential energy |
| C. | stored energy |
| D. | fission energy |
| Answer» C. stored energy | |
| 2524. |
Why does water boil at a temperature below 100°C at high altitudes? |
| A. | As the atmospheric pressure decreases, the boiling point comes down |
| B. | because gravity is less |
| C. | Due to heavy winds on the mountains |
| D. | none of the above |
| Answer» B. because gravity is less | |
| 2525. |
Often the light roofs of thatch or tin get blown away when a strong storm comes, because . . . . . . |
| A. | Roofs are complex |
| B. | The roofs are not tight |
| C. | High velocity air blowing over the roof Ceiling - pressure on the surface |
| D. | thatch roofs are automatically blown away by strong winds |
| Answer» D. thatch roofs are automatically blown away by strong winds | |
| 2526. |
When two pieces of ice are pressed together, the pieces stick together because. . . . . . . . |
| A. | The melting point of ice decreases as the pressure increases |
| B. | The melting point of ice increases as the pressure increases |
| C. | With high pressure, the melting point of ice first decreases and then increases. |
| D. | There is no relation between pressure and melting point |
| Answer» B. The melting point of ice increases as the pressure increases | |
| 2527. |
A rubber balloon filled with hydrogen explodes when it rises in the air because . . . |
| A. | the weight of hydrogen increases |
| B. | air pressure rises |
| C. | the weight of hydrogen decreases |
| D. | air pressure drops |
| Answer» E. | |
| 2528. |
The surface tension when soap is dissolved in water. . . . . . . . |
| A. | happens to |
| B. | rises up |
| C. | remains unchanged |
| D. | first decreases then increases |
| Answer» B. rises up | |
| 2529. |
climbs into the light of the lamp, because . . . . . . . . . . . . . . |
| A. | oil is too light |
| B. | oil is volatile |
| C. | due to decreased surface tension |
| D. | due to capillary action |
| Answer» E. | |
| 2530. |
Pliers and tongs are related to which of the following types of levers? |
| A. | from other types of levers |
| B. | from the third type of levers |
| C. | from the second and third types of levers respectively |
| D. | from the first and third types of levers respectively |
| Answer» D. from the first and third types of levers respectively | |
| 2531. |
A cyclist turns around in a turn, then he . . . . |
| A. | leans out |
| B. | leans inward |
| C. | leans forward |
| D. | doesn't budge at all |
| Answer» C. leans forward | |
| 2532. |
Heavy iceberg melts from the bottom rather than the top because . . . . . . |
| A. | Lower floor temperature is higher |
| B. | Melting point decreases due to higher pressure of the lower plane. |
| C. | ice is not a real solid |
| D. | none of the above |
| Answer» C. ice is not a real solid | |
| 2533. |
What should a person do to reduce his (angular) speed on a freely rotating rotating platform? |
| A. | shake your hands together |
| B. | spread your hands out |
| C. | raise your hands |
| D. | viscosity |
| Answer» C. raise your hands | |
| 2534. |
A tennis ball bounces higher on a hill than on a field because . . . . . |
| A. | air pressure over mountains |
| B. | The ball gets lighter on the mountains |
| C. | Earth's acceleration due to gravity decreases on mountains |
| D. | none of the above |
| Answer» D. none of the above | |
| 2535. |
Hurricane is predicted when the atmospheric pressure . . . . . . |
| A. | usually increase |
| B. | progressively increase |
| C. | usually decrease |
| D. | gradually decrease |
| Answer» D. gradually decrease | |
| 2536. |
It is harder to walk on snow than on the road, because . . . . |
| A. | snow is harder than the road |
| B. | the road is hard with snow |
| C. | Snow doesn't react when we push with our feet |
| D. | Friction is less in snow than in road tax |
| Answer» E. | |
| 2537. |
If an egg is put in normal water, it sinks, but if a large amount of salt is mixed in the water, then the egg is put in it. . . . |
| A. | the egg will sink completely |
| B. | the egg will remain in the middle of the pot of water |
| C. | the egg will float in the water |
| D. | Sometimes the egg will sink and sometimes it will float |
| Answer» D. Sometimes the egg will sink and sometimes it will float | |
| 2538. |
When a bottle is filled with water and allowed to freeze, the bottle breaks because . . . . . . . . . |
| A. | water expands when it freezes |
| B. | Bottle shrinks at freezing point |
| C. | The outside temperature of the bottle is higher than the inside |
| D. | water expands on heating |
| Answer» B. Bottle shrinks at freezing point | |
| 2539. |
Ordinary clocks run slowly in summer because - |
| A. | The length of the oscillator increases and the time period increases |
| B. | The length of the oscillator increases and the time period decreases |
| C. | The length of the oscillator decreases and the time period increases |
| D. | The length of the oscillator decreases and the time period decreases |
| Answer» B. The length of the oscillator increases and the time period decreases | |
| 2540. |
The mass of a hypotenuse is m and the momentum is p, its kinetic energy will be |
| A. | mp |
| B. | p²m |
| C. | p² / m |
| D. | p² / 2m |
| Answer» E. | |
| 2541. |
Ice is floating on water in a beaker. When the ice melts completely, the water level in the beaker will be . . . . . . |
| A. | will grow |
| B. | will decrease |
| C. | will remain the same |
| D. | will increase first then decrease |
| Answer» D. will increase first then decrease | |
| 2542. |
Oil spreads on the surface of water because . . . . . . . |
| A. | Oil is more dense than water |
| B. | Oil is less dense than water |
| C. | Surface tension of oil is higher than that of water |
| D. | surface tension of oil is less than that of water |
| Answer» E. | |
| 2543. |
If the length of the pendulum is increased to four times, then the time of swing of the pendulum. . . . . . |
| A. | decreases |
| B. | is doubled |
| C. | becomes one-fourth |
| D. | becomes four times |
| Answer» C. becomes one-fourth | |
| 2544. |
When the Fortin barometer is taken to a high mountain, the mercury in the tube drops because . . . . . . |
| A. | there the air is relatively light |
| B. | With the decrease in temperature, the mercury decreases |
| C. | There the atmospheric pressure becomes low |
| D. | there the surface tension decreases |
| Answer» D. there the surface tension decreases | |
| 2545. |
Hooke's principle is related to which of the following? |
| A. | by fluid pressure |
| B. | elastically |
| C. | by radioactivity |
| D. | none of these |
| Answer» C. by radioactivity | |
| 2546. |
Why do pendulum watches become dull in summer? |
| A. | Because of the long summer days |
| B. | due to friction in the coil |
| C. | The length of the pendulum increases so that the time taken in unit oscillation increases |
| D. | The pendulum increases in heat |
| Answer» D. The pendulum increases in heat | |
| 2547. |
Food gets cooked quickly in pressure cooker because. . . . . . |
| A. | All the heat stays inside. |
| B. | This raises the temperature of the content. |
| C. | By the act of spreading the part. |
| D. | This increases the boiling point of water. |
| Answer» E. | |
| 2548. |
A polythene balloon filled with hydrogen is released from the surface of the earth. Due to the high altitude of the atmosphere? |
| A. | the size of the balloon will decrease |
| B. | The balloon will flatten into a disc type. |
| C. | the size of the balloon will increase |
| D. | The size and shape of the balloon will remain the same as before |
| Answer» D. The size and shape of the balloon will remain the same as before | |
| 2549. |
Why is it more difficult to breathe on mountains than on planes? |
| A. | As altitude increases, the air pressure decreases and the need for oxygen increases. |
| B. | Mountain air is heavy, and cannot even enter the lungs |
| C. | Mountain air is impure, so we cannot take |
| D. | none of the above |
| Answer» B. Mountain air is heavy, and cannot even enter the lungs | |
| 2550. |
A ship moving in a river comes into the sea, then the level of the ship. . . . . . |
| A. | as before |
| B. | will come up a bit |
| C. | will come down a bit |
| D. | will be up or down depending on the load lying in it |
| Answer» C. will come down a bit | |