General Science Questions

Q:

Balloons are filled with

A) oxygen B) nitrogen
C) argon D) helium
 
Answer & Explanation Answer: D) helium

Explanation:
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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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Q:

Heavy water is

A) PH7 B) rain water
C) deuterium oxide D) tritium oxide
 
Answer & Explanation Answer: C) deuterium oxide

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Q:

The gases used in different types of welding would include

A) oxygen and hydrogen B) oxygen and acetylene
C) oxygen, acetylene and argon D) oxygen, hydrogen, acetylene and nitrogen
 
Answer & Explanation Answer: B) oxygen and acetylene

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Q:

What is the scientific name for washing soda?

A) Sodium carbonate B) Sodium bicarbonate
C) Calcium carbonate D) Calcium bicarbonate
 
Answer & Explanation Answer: A) Sodium carbonate

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Q:

Which of the following is used in pencils?

A) Silicon B) Phosphorous
C) Graphite D) Charcoal
 
Answer & Explanation Answer: C) Graphite

Explanation:

A pencil is an implement for writing or drawing. It is a thin core of graphite well mixed with clay, inside a wooden body as protective casing that prevents the core from being broken.

Which_of_the_following_is_used_in_pencils1558506948.jpg image

 

 

 

 

 

 

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Q:

In a laser (say neon laser) all the atoms emit the light waves of 

A) Same frequency B) Same amplitude
C) Same phase D) All the above
 
Answer & Explanation Answer: D) All the above

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Q:

Which of the following has got more heat capacity?

A) Iron piece B) Water
C) Gold piece D) Benzene
 
Answer & Explanation Answer: B) Water

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