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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.
| 2601. |
When we pull the bucket of water up from the well, we feel that the bucket. . . . . . . |
| A. | the water has become heavy above the surface |
| B. | above the surface of the water has become lighter |
| C. | has lost its stability after coming out of the water |
| D. | Coming out of the water is achieved in its mass |
| Answer» B. above the surface of the water has become lighter | |
| 2602. |
The water on the upper surface of the pond remains cool on hot days because - |
| A. | Surface water evaporates, resulting in cooling. |
| B. | The heat absorbed by the surface of the water is transmitted towards the bottom. |
| C. | The water at the bottom is cold and the heat is transmitted towards the bottom. |
| D. | There is no such reason as above. |
| Answer» B. The heat absorbed by the surface of the water is transmitted towards the bottom. | |
| 2603. |
Any boat will sink if it removes the water on its own. . . . . . |
| A. | equal to volume |
| B. | equal to weight |
| C. | equal to the page |
| D. | equal to the density |
| Answer» B. equal to weight | |
| 2604. |
The great scientist Archimedes belonged to which country? |
| A. | Britain |
| B. | Germany |
| C. | United States |
| D. | Greece |
| Answer» E. | |
| 2605. |
A bottle with a stopper filled with water will break when it freezes, because . . . . . |
| A. | Bottle shrinks when frozen |
| B. | The volume of water decreases when it freezes |
| C. | The volume of water increases when it freezes |
| D. | glass is a bad conductor of heat |
| Answer» D. glass is a bad conductor of heat | |
| 2606. |
Why is there some improvement in radio reception (acquisition) at night? |
| A. | Outside noise at night is reduced |
| B. | Few radio stations broadcast in the night as compared to the day. |
| C. | Sunlight during the day affects radio broadcasts to some extent. |
| D. | At night, the Earth's magnetic field becomes less intense and affects broadcasts less. |
| Answer» D. At night, the Earth's magnetic field becomes less intense and affects broadcasts less. | |
| 2607. |
When is sonography done? |
| A. | kidney stones |
| B. | destroy fibrous tissue |
| C. | take pictures of internal organs |
| D. | muscle vibrations to be measured |
| Answer» D. muscle vibrations to be measured | |
| 2608. |
When an object is immersed wholly or partially in a liquid, there appears to be some decrease in its weight and the apparent decrease in its weight is equal to the weight of the fluid displaced by that object. Is this a theory? |
| A. | The theory of Barnauli |
| B. | Archimedes' theory |
| C. | Pascal's theory |
| D. | Hooke's principle |
| Answer» C. Pascal's theory | |
| 2609. |
What will be the change in the volume of water if the temperature is dropped from 9℃ - to 3℃? |
| A. | there will be no change in volume |
| B. | Volume will increase first and then decrease |
| C. | Volume will decrease first and then increase |
| D. | water will freeze |
| Answer» D. water will freeze | |
| 2610. |
Water pipe bursts due to extreme cold in winter nights because . . . . . . . . . . . . |
| A. | The density of water decreases after it freezes. |
| B. | Water becomes hard after it freezes, so its hardness breaks the pipe. |
| C. | After freezing, the volume of water increases. |
| D. | The metal of the water pipe melts after solidification. |
| Answer» D. The metal of the water pipe melts after solidification. | |
| 2611. |
A man pushes a wall but fails to displace it, what does he do? |
| A. | no work |
| B. | positive but not maximum work |
| C. | negative work |
| D. | max work |
| Answer» B. positive but not maximum work | |
| 2612. |
Ice floats in water but sinks in alcohol because . . . . |
| A. | Water is transparent than alcohol |
| B. | ice is formed by freezing of water |
| C. | Ice is a solid while alcohol is a liquid |
| D. | Ice is lighter than water and heavier than alcohol |
| Answer» E. | |
| 2613. |
A steel bullet floats in mercury because . . . . . . |
| A. | Nothing can sink in mercury |
| B. | The density of mercury is higher than that of steel |
| C. | Density of steel is higher than that of mercury |
| D. | bullet can't float |
| Answer» C. Density of steel is higher than that of mercury | |
| 2614. |
The historical Tower of Pisa does not fall even though it is slanting, because . . . . . . . |
| A. | The vertical line going from its center of gravity goes through the base. |
| B. | The vertical line passing through its center of gravity does not pass through the base. |
| C. | There is divine influence behind this. |
| D. | This is a surprise. |
| Answer» B. The vertical line passing through its center of gravity does not pass through the base. | |
| 2615. |
The work done to hold a weight of 20 kg at a height of 1 m above the ground is |
| A. | 20 joules |
| B. | 200 joules |
| C. | 981 joules |
| D. | zero joules |
| Answer» E. | |
| 2616. |
A person climbing a hill leans forward because . . . . . . . . |
| A. | be able to walk fast |
| B. | reduce the chance of slipping |
| C. | to conserve power |
| D. | To increase stability and balance |
| Answer» E. | |
| 2617. |
Which of the following statements is related to Newton's third law of motion? |
| A. | It is also called the law of action-reaction. |
| B. | Action and reaction always take place on different bodies. |
| C. | The forward movement of the rocket is an example of this. |
| D. | All of the above |
| Answer» E. | |
| 2618. |
An astronaut can jump higher on the lunar surface than on Earth because . . . . . . |
| A. | he is weightless on the moon |
| B. | there is no atmosphere on the moon |
| C. | The gravitational force on the lunar surface is smaller than that on the Earth's surface |
| D. | the moon is smaller than the earth |
| Answer» D. the moon is smaller than the earth | |
| 2619. |
When a person lands on the moon, the presence in his body. . . . . . . . . |
| A. | There was a change in the amount of matter. |
| B. | Weight decreases but quantity remains unchanged. |
| C. | There is a change in the load. |
| D. | There is a decrease in both volume and weight. |
| Answer» C. There is a change in the load. | |
| 2620. |
Rocket. . . . . . . . . . Works on the principle of? |
| A. | Energy Conservation |
| B. | Bernoulli's theorem |
| C. | avogadro hypothesis |
| D. | momentum conservation |
| Answer» E. | |
| 2621. |
Due to which force does a horse pulling a cart move forward? |
| A. | by the force exerted by the cart on the horse |
| B. | by the force exerted by the horse on the cart |
| C. | The force exerted by the horse on the earth with its feet |
| D. | by the force exerted by the earth on the feet of the horse |
| Answer» E. | |
| 2622. |
Why does a cricket player catch a fast approaching ball by pulling his hand back? |
| A. | The ball may come to rest |
| B. | Ball can stay in accelerated position |
| C. | Maybe it needs to apply less force |
| D. | Maybe it needs to apply more force |
| Answer» B. Ball can stay in accelerated position | |
| 2623. |
Why does a passenger fall in front of a moving vehicle when it comes to a sudden stop? |
| A. | it is a voluntary response |
| B. | Traveler pushes through his carelessness |
| C. | The lower part of the passenger's body stops but the upper part remains in motion due to inertia |
| D. | none of the above |
| Answer» D. none of the above | |
| 2624. |
What is the property of a body called by which it opposes any change in the state of rest or uniform motion in a straight line? |
| A. | immobility |
| B. | inertia |
| C. | Total weight |
| D. | inactivity |
| Answer» C. Total weight | |
| 2625. |
Which of the following statements is true according to Newton's second law of motion? |
| A. | This gives the definition of inertia |
| B. | This gives the definition of force |
| C. | This gives the principle of conservation of momentum |
| D. | all of the above |
| Answer» C. This gives the principle of conservation of momentum | |
| 2626. |
There is no change in the position and direction of any stationary or moving object unless there is an external force acting on it. . . . |
| A. | Newton's first law of motion |
| B. | Newton's second law of motion |
| C. | Newton's third law of motion |
| D. | Galilean's law of motion |
| Answer» B. Newton's second law of motion | |
| 2627. |
“For every action there is an equal and opposite reaction. '' |
| A. | Newton's first law of motion |
| B. | Newton's second law of motion |
| C. | Newton's third law of motion |
| D. | none of the above |
| Answer» D. none of the above | |
| 2628. |
A girl is swinging in a sitting position on the swing. The time period of the oscillations when the girl stands up is . . . . . . |
| A. | will decrease |
| B. | will depend on the height of the girl |
| C. | will be more |
| D. | will remain unchanged |
| Answer» B. will depend on the height of the girl | |
| 2629. |
According to Newton's third law of motion, the respective forces of action and reaction. . . |
| A. | Always be engaged on the same object. |
| B. | Can be attached to different objects. |
| C. | Always be engaged on different things. |
| D. | They do not have to be equal in magnitude, but they should have the same direction. |
| Answer» D. They do not have to be equal in magnitude, but they should have the same direction. | |
| 2630. |
Acceleration produced by an unbalanced force in a body. . . . . . |
| A. | is inversely proportional to the force |
| B. | is directly proportional to the force |
| C. | independent of force |
| D. | is zero |
| Answer» C. independent of force | |
| 2631. |
There is a difference between mass and weight of a body, because . . . . |
| A. | Mass is variable while weight remains constant |
| B. | Mass remains constant while weight is variable |
| C. | both are true |
| D. | both are wrong |
| Answer» C. both are true | |
| 2632. |
Suddenly a boy comes and sits on a rotating round table. What will be the effect on the angular velocity of the table? |
| A. | will decrease |
| B. | Will increase |
| C. | will remain the same |
| D. | nothing can be said |
| Answer» B. Will increase | |
| 2633. |
An iron nail floats in mercury, while it sinks in water? |
| A. | The tendency of iron to chemically react with mercury is less than that of water. |
| B. | Iron weighs more than water and less than mercury |
| C. | The density of iron is greater than that of water and less than that of mercury. |
| D. | mercury is heavier than water |
| Answer» D. mercury is heavier than water | |
| 2634. |
A wooden barrel is easier to roll than to pull, because . . . . |
| A. | When it is pulled, the part of the object acts. |
| B. | The frictional force of the rolling state is much less than the frictional force of the slippery state. |
| C. | Surface area of barrel in contact with road in drag |
| D. | Any other option other than the above options |
| Answer» C. Surface area of barrel in contact with road in drag | |
| 2635. |
What is the reason for the spherical shape of a raindrop? |
| A. | density of matter |
| B. | surface tension |
| C. | Atmospheric pressure |
| D. | gravity |
| Answer» C. Atmospheric pressure | |
| 2636. |
Why can we hear short wave transmissions better than long wave transmissions? |
| A. | more energy in short waves than in long waves |
| B. | Small waves are not affected by atmospheric disturbance |
| C. | Short wave transmissions are carried out by nearby radio stations |
| D. | Conventional short waves are for long distances and long waves are reserved for short distances |
| Answer» E. | |
| 2637. |
Can a pendulum clock run faster? |
| A. | in summer |
| B. | in winter |
| C. | in spring |
| D. | in the rainy season |
| Answer» C. in spring | |
| 2638. |
A dynamo is a machine whose name is . . . . . . . |
| A. | convert high voltage to low |
| B. | convert low voltage to high |
| C. | converting electrical energy into mechanical energy |
| D. | converting mechanical energy into electrical energy |
| Answer» E. | |
| 2639. |
When a moving bus suddenly applies the brakes, the passengers sitting in it fall in the forward direction. By whom can this be explained? |
| A. | The theory of relativity |
| B. | Newton's first law |
| C. | Newton's second law |
| D. | Newton's third law |
| Answer» C. Newton's second law | |
| 2640. |
Suppose we have an iron nail and an iron ball of the same mass. When immersed in water, an iron ball may float but the nail will always sink. What is the reason for this ? |
| A. | Due to the size of both, the buoyant force is greater on the ball than on the nail. |
| B. | The viscous force on the ball is relatively high. |
| C. | The viscous force on the nail is relatively high. |
| D. | The force of gravity affects the ball differently than the nail. |
| Answer» C. The viscous force on the nail is relatively high. | |
| 2641. |
When a solid body is immersed in water, its weight decreases, how much is this loss? |
| A. | equal to the weight of the displaced water |
| B. | less than the weight of the displaced water |
| C. | more than the weight of the displaced water |
| D. | not related to the weight of the displaced water |
| Answer» B. less than the weight of the displaced water | |
| 2642. |
A man is sitting on a stool with his arms outstretched, rotating if he suddenly bends his arms, the angular velocity of the person is . . . . . |
| A. | Will increase |
| B. | will decrease |
| C. | will be zero |
| D. | will be stable |
| Answer» B. will decrease | |
| 2643. |
How many coordinates are needed to fully describe the motion of an ant moving on a thin circle? |
| A. | One |
| B. | Two |
| C. | three |
| D. | Zero |
| Answer» C. three | |
| 2644. |
A particle is moving freely, then its . . . . . |
| A. | kinetic energy is always greater than zero |
| B. | Potential energy is greater than zero and kinetic energy is less than zero |
| C. | Potential energy is less than zero and kinetic energy is greater than zero |
| D. | potential energy is zero and kinetic energy is less than zero |
| Answer» B. Potential energy is greater than zero and kinetic energy is less than zero | |
| 2645. |
A car is moving with a uniform speed, while its momentum is changing, until that car . . . |
| A. | may be on an elliptical path |
| B. | moving on a straight path without acceleration |
| C. | moving along a straight line with acceleration |
| D. | moving without any acceleration |
| Answer» B. moving on a straight path without acceleration | |
| 2646. |
We feel relatively more weight in the lift, when the lift . . . . |
| A. | goes down at a constant speed |
| B. | like going up |
| C. | goes up at a constant speed |
| D. | descends freely |
| Answer» C. goes up at a constant speed | |
| 2647. |
A body is moving without acceleration. What is its rate of change of momentum? |
| A. | non-zero constant |
| B. | Zero |
| C. | not constant |
| D. | none of the above |
| Answer» C. not constant | |
| 2648. |
If the length of the simple pendulum is increased by 4 times, then the time period of its oscillation is . . . . |
| A. | will decrease by 4 times |
| B. | will increase 4 times |
| C. | will be reduced to half of the initial value |
| D. | will increase by a multiple of 2 from its initial value |
| Answer» E. | |
| 2649. |
If there is ice in a glass, then drops of water come out of it because. . . . . |
| A. | moisture in the air |
| B. | cold water comes out |
| C. | some water falls out |
| D. | ice is lighter than water |
| Answer» B. cold water comes out | |
| 2650. |
The cross is not visible in the fog, because . . . . . . |
| A. | fog absorbs light |
| B. | The refractive index of fog is infinite |
| C. | light is reflected on the droplets in the fog |
| D. | light is scattered by the droplets in the fog |
| Answer» E. | |