General Science Set 42 FAQs

1. Water vapour rises in the atmosphere because it is:

2. Which of the following is pollinated by wind?

3. Consider the following statements about the motion of an object under the gravitational influence of another object: (I) Angular momentum is conserved. (II) Total mechanical energy is conserved. (III) Linear momentum is conserved. Which of the above is/are correct?

4. The tiny pores on the surface of leaves that help in the exchange of gases are:

5. Materials having a lustrous appearance are usually:

6. Cyclones form over:

7. Which of the following are natural agents that help in turning and loosening the soil?

8. According to Kepler's law of orbits, planets move in:

9. The unique ability of carbon to form bonds with other carbon atoms, giving large molecules, is called:

10. The combined challenge of climate change, biodiversity loss and pollution is known as the:

11. Assertion (A): Grains sprinkled on a stretched sheet jump when a loud sound is produced near it, without touching it. Reason (R): Sound is a form of energy. Choose the correct statement:

12. Blood is classified as a:

13. Rh incompatibility between an Rh-negative mother and an Rh-positive foetus causes:

14. A concave mirror has a focal length of −10 cm. An object is placed 30 cm in front of it. The image distance is:

15. Magnesium burns in air with a:

16. M.W. Beijerinck described the infectious extract of diseased tobacco plants as:

17. The mechanical advantage of a machine is the ratio of:

18. The small bone that protects the knee joint is the:

19. The fraction of solar radiation reflected by a surface is called its:

20. In a solution formed by dissolving a solid in a liquid, the solid component is called the:

21. The tiny pores on the surface of leaves that help plants take air in and out are:

22. Atmospheric CO₂ has risen from about 315 ppm in 1960 to about:

23. Metals in the middle of the reactivity series, such as zinc, iron and lead, are found in the earth's crust mainly as:

24. The tissue that transports water and minerals from the roots to other parts of the plant is:

25. Consider the following statements: (I) Every oscillatory motion is periodic. (II) Every periodic motion is oscillatory. (III) Circular motion is periodic but not oscillatory. Which of the above is/are correct?

26. Home-made ORS is prepared by mixing common salt and sugar in one litre of boiled and cooled water. The amount of sugar used is:

27. The space of 10 to 50 nm between the two membranes of the nuclear envelope is called the:

28. The continuous movement of water upward as water vapour and downward through precipitation is called the:

29. A healthy adult man has, on average, ___ RBCs per mm³ of blood.

30. In churning of curd, butter separates at the top because it is: