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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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