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:

The weight of an object will be minimum when it is placed at 

A) The North Pole B) The South Pole
C) The Equator D) The center of the Earth
 
Answer & Explanation Answer: D) The center of the Earth

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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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