1. Fish can survive in a frozen lake because

2. When a ship enters a sea from a river, what happens?

3. Oil spreads on water surface because

4. Consider the figure of a fountain with four holes, given below. Which one of the holes in the fountain will throw the water farthest?

5. Kerosene oil floats on water because

6. Mobiles and Automobiles have brought about a revolution in the social life of Indians, especially in the rural, in terms of
1. Mobility of the people
2. Connectivity of the people
3. Sensitivity of the people Select the correct answer from the code given below.

7. Why it is easier to swim in the sea than in a river?

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

9. A sudden fall in barometer reading indicates that the weather will be

10. 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?

11. 200 gm of water is filled in a weightless balloon. Its weight in water will be

12. The clouds float in the atmosphere because of their low

13. The maximum density of water is at

14. Which of the following elements was first produced artificially?

15. The separation of cream from milk by churning is due to

16. Consider the following statement. If there were no phenomenon of capillarity.
1. It would be difficult to use a kerosene lamp then.
2. One would not be able to use a straw to consume a soft drink.
3. The blotting paper would fail to function.
4. The big trees that we see around would not have grown on the Earth. Which of the following statements given above are correct?

17. While floating in a sea what part of an iceberg is above the surface of the sea?

18. In automobile hydraulic brakes work on

19. Static science is associated with

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

21. The rain drops are spherical because

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

23. The most important property of nanomaterial is

24. 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?

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