General Science-53

1. In the electric supply lines in India, which parameter is kept constant?
a. Current
b. Voltage
c. Power
d. Frequency

2. Which one of the following is used to determine the age of human fossils?
a. Density determination of fossil
b. softness of the fossil
c. Radio-carbon dating
d. Water content of the fossil

3. It is an industrial process of producing ammonia by the reaction of nitrogen by the reaction of nitrogen with hydrogen in the presence of a catalyst:
a. Solvay process
b. Bayer process
c. Haber process
d. Bessemer process

4. The mass of the body at the centre of earth is:
a. Less than at the surface
b. Remains constant
c. More than the surface
d. Zero

5. To shield an instrument from an external magnetic field it may be placed in a cabinet made of
a. Wood
b. Ebonite
c. Metal
d. diamagnetic substance

6. The compounds leading to the origin of life were:
a. Urea and nucleic acid
b. Amino acids and urea
c. Proteins and nucleic acid
d. Protein and amino acids

7. The scent sprayer is based on
a. Carle's law
b. Boyle's law
c. Archimede's principle
d. Bernoulli's theorem

8. A person is standing on a rotating stool spreading his arms. What will happen if he suddenly contracts his arm?
a. His angular momentum increases
b. His moment of inertia increases
c. His moment of inertia decreases
d. His angular momentum decreases

9. The enzyme that converts glucose to ethyl alcohol is:
a. Invertase
b. Maltase
c. Zymase
d. Diastase

10. pH value of pure water is :
a. Less than 7
b. More than 7
c. Equal to 7
d. Zero