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1. What is the main constituent of coal gas?

[a] Oxygen
[b] Water
[c] Nitrogen
[d] Methane

2. Old written material, which cannot be read easily, can be read by

[a] Cosmic rays
[b] Ultraviolet rays
[c] Infrared rays
[d] none of these

3. If the distance between two masses is increased by a factor of 2, the gravitational force of attraction between them will

[a] reduce by a factor of 4
[b] reduce by a factor of 2
[c] remain Same
[d] increase by a factor of 2

4. The current I drawn from the 5 volt source will be

[a] 0.17 A
[b] 0.33 A
[c] 0.5 A
[d] 0.67 A

5. A red object, when seen through a thick blue glass, appears

[a] White
[b] Black
[c] Blue
[d] None of these

6. Which of the following is used as a moderator in nuclear reactor?

[a] Ordinary water
[b] Radium
[c] Thorium
[d] Graphite

7. In an atomic nucleus, neutrons and protons are held together by

[a] Gravitational forces
[b] Magnetic forces
[c] Exchange forces
[d] Coulombic forces

8. Television signal cannot be received generally beyond a particular distance due to

[a] Curvature of the earth
[b] Weakness of antenna
[c] Weakness of signal
[d] absorption of signal in air

9. Which one of the following is the unit of activity of a radioactive source?

[a] Lux
[b] Becquerel
[c] Tesla
[d] Siemens

10. Which one of the following is a good conductor of electricity?

[a] Shellac
[b] Ebonite
[c] Glass
[d] Human body

11. In a sitar wire which one of the following types of vibration is produced?

[a] Progressive longitudinal
[b] Stationary longitudinal
[c] Progressive transverse
[d] Stationary transverse

12. Which gas in the atmosphere saves us from the ultra violet rays of the sun?

[a] Nitrogen
[b] Oxygen
[c] Ozone
[d] Carbon Monoxide

13. What is the study of plants called?

[a] Physics
[b] Chemistry
[c] Zoology
[d] Biology

14. The three methods of science are observation, experimentation and

[a] Hypothesis
[b] Measurement
[c] Deduction
[d] inference

15. The Central Arid Zone Research Institute (CAZRI) is located at

[a] Jaipur
[b] Jodhpur
[c] Jaisalmer
[d] Jallandhar

16. What is the more common name for a polymer of amino acids?

[a] Protein
[b] Carbohydrate
[c] Enzyme
[d] Sugar

17. Which rare element would you associate with Marie and Pierre Curie?

[a] Uranium
[b] Gold
[c] Radium
[d] Platinum

18. Which chemical element is represented by the symbol Zn?

[a] Aluminium
[b] Copper
[c] Gold
[d] Zinc

19. Who discovered Penicillin?

[a] Robert Koch
[b] Sir Alexander Fleming
[c] Watson and Crick
[d] Louis Pasteur

20. In which one among the following is the speed of sound maximum?

[a] Ait at 0 degree
[b] Ait at 100 degree
[c] Water
[d] Wood

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