Sets
General Science Set 4
30 questions 1. The time period of a simple pendulum of length 0.25 m at g = 9.8 m s⁻² is approximately:
2. The number of valence electrons in a chlorine atom is:
3. In plants, carbohydrates not used immediately are stored in the form of:
4. A sheet 0.2 mm thick is made of atoms of diameter about 10⁻¹⁰ m stacked in a line. The approximate number of atoms across its thickness is:
5. Villages with more mangroves experienced less destruction during the super cyclone that hit Orissa in:
6. Bags of chips are flushed with which gas to prevent oxidation?
7. When white light passes through a glass prism, the colour that bends the most is:
8. The inhalation of tobacco-polluted air by non-smokers is called:
9. A device used to change the resistance in an electric circuit without changing the voltage source is called a:
10. Raja Ramanna is often called the:
11. Body-building foods are rich in:
12. Which of the following is a Class II lever?
13. A mixture of camphor and sand can be separated by:
14. The development of the embryo in a seed into a seedling under appropriate conditions is called:
15. Consider the following statements about an inclined plane:
(I) For the same height, a longer plane requires a smaller effort.
(II) The work done on the load decreases as the plane becomes longer.
(III) Its mechanical advantage is greater than 1.
Which of the above is/are correct?
16. Consider the following statements about vaccines:
(I) They are preventive, not curative.
(II) They can be made from weakened or dead pathogens.
(III) They treat a disease once a person is already sick.
Which of the above is/are correct?
17. The gas dissolved in water that is essential for the survival of aquatic animals and plants is:
18. Electromagnetic waves travel in vacuum with a speed of:
19. The place where plants and animals live is called their:
20. Heating sugar gently in a boiling tube leaves behind: