Quiz on General Science (Physics) For WBCS Prelims Exams P4

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Page 4

158631. The blue color of the sky is due to

A

Reflection

B

Dispersal

C

Scattering

D

Refraction

C

Correct Answer: C. Scattering

150432. The temperature at which Celsius and Fahrenheit's scales give the same reading is

A

- 40°C

B

40°C

C

0°C

D

32°C.

A

Correct Answer: A. - 40°C

152433. Two bales at the same temperature collide. What is conserved?

A

Linear momentum

B

Kinetic energy

C

Temperature

D

Velocity

A

Correct Answer: A. Linear momentum

255134. Sound waves travel fastest in

A

solids

B

liquids

C

gases

D

vacuum

A

Correct Answer: A. solids

148835. The weight of an iron ball on earth is 12 kg-wt. Its weight on the moon will be

A

12 kg-wt

B

2 kg-wt

C

18 kg-wt

D

9 kg-wt

B

Correct Answer: B. 2 kg-wt

159836. Magnetism at the center of a bar magnet is

A

Zero

B

Maximum

C

Minimum

D

Minimum or maximum

A

Correct Answer: A. Zero

160837. A radioactive isotope has a half-life period of 3 days. After how many days I gm of it will change to 0.125 gm?

A

6 days

B

12 day

C

24 days

D

9 days

D

Correct Answer: D. 9 days

150738. Select the best response: One should wear a colored dress in winter because

A

They absorb heat

B

it is easy to wash them

C

They look colorful

D

They are cheaper

A

Correct Answer: A. They absorb heat

156839. At what temperature, the mass of pure water of volume 1 cubic centimeter is 1 gm?

A

4°C

B

9°C

C

0°C

D

3°C

A

Correct Answer: A. 4°C

154040. Solar energy is due to

A

Nuclear fission reaction

B

Chemical reaction

C

Nuclear fusion reaction

D

Burning of H2O

C

Correct Answer: C. Nuclear fusion reaction

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