General Science Questions

Q:

Which one of the following types of waves are used in a night vision apparatus?

A) Radio waves B) Microwaves
C) Infra-red waves D) None of the above
 
Answer & Explanation Answer: C) Infra-red waves

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Q:

The blue colour of the clear sky is due to

A) Diffraction of light B) Dispersion of light
C) Reflection of light D) Refraction of light
 
Answer & Explanation Answer: B) Dispersion of light

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Q:

As you go down into a well, your weight

A) increases slightly B) decreases slightly
C) remains exactly the same D) None of the above
 
Answer & Explanation Answer: B) decreases slightly

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Q:

What does airbag, used for safety of car driver, contain?

A) Sodium bicarbonate B) Sodium azide
C) Sodium nitrite D) Sodium peroxide
 
Answer & Explanation Answer: B) Sodium azide

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Q:

In fireworks, the green flame is produced because of

A) Sodium B) Potassium
C) Barium D) Mercury
 
Answer & Explanation Answer: C) Barium

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