1. Kerosene rises in the wick of the stove is due to

2. A needle sinks in water whereas a ship made of iron floats on it because

3. Assertion (A): When a ship enters a sea from a river, it rises a little. Reason (R): The density of sea water is greater than that of river water. In the context of the above statements, which of the following is true?

4. In automobile hydraulic brakes work on

5. The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. Why? Following are some options

6. Which of the following is the byproduct derived from the refining process of petroleum?

7. If an unsaturated sugar solution is prepared by mixing 100 grams of sugar with half litre of water, which of the following physical quantities will not change?

8. The size of the Respirable Suspended Particulate Matter
(R.S.P.M.) in air is

9. When an air bubble at the bottom of lake rises to the top, it will

10. Spherical form of raindrop is due to

11. The most important property of nanomaterial is

12. For which one of the following capillarity is not the only reason?

13. With the rise of temperature, the viscosity of liquid

14. Four wires of same material and dimensions as mentioned below are stretched by a load of same magnitude separately. Which one of them will be elongated maximum?

15. An iron needle floats on the surface of water due to

16. In cold weather, aquatic animals survive even when water at the top layer of the lake freezes into ice because

17. While lifting a bucket of water from a well, we feel that the bucket

18. The rain drops are spherical because

19. While travelling by plane, the ink of the pen starts to come out

20. Assertion (A): The weight of human being on the Moon is1/6 in comparison to Earth. Reason (R): The Moon does not have gravity like Earth. Select the answer from following codes.

21. Consider the following statements. A Simple Pendulum is set into oscillation. Then,
1. the acceleration is zero when the bob passes through the mean position.
2. in each cycle the bob attains a given velocity twice.
3. both acceleration and velocity of the bob are zero when it reaches its extreme position during the oscillation.
4. the amplitude of oscillation of the simple pendulum decreases with time. Which of these statements are correct?

22. Increasing the amount of a substance does not change its

23. The tendency of a liquid drop to contract and occupy minimum area is due to

24. At which temperature density of water is maximum?

25. The density of water will reach its maximum value at the temperature of