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Q:

The process that takes place in the atom bomb is

A) nuclear fusion B) nuclear fission
C) radioactive disintegration D) chemical decomposition

Answer:   B) nuclear fission

Explanation:

In the atom bomb, isotopes of uranium are  disintegrated with the release of a large amount of energy. Hence, the process is nuclear fission.

Subject: Chemistry
Q:

Leakage of which of the following gases caused the Bhopal gas tragedy ?

A) Carbon monoxide B) Methyl isocyanate
C) Nitrous oxide D) Hydrogen sulphide
 
Answer & Explanation Answer: B) Methyl isocyanate

Explanation:
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Q:

Which one of the following is used to induce artificial rain ?

A) Potassium Nitrate B) Ammonium chloride
C) Calcium carbonate D) Silver lodide
 
Answer & Explanation Answer: D) Silver lodide

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Q:

A ‘breath test’ used by traffic police to check drunken driving uses ____?

A) Turmeric on filter paper B) Silica gel coated with silver nitrate
C) potassium permanganate-sulphuric acid D) Potassium dichromatic-sulphuric acid
 
Answer & Explanation Answer: D) Potassium dichromatic-sulphuric acid

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Q:

The enzyme that converts glucose to ethyl alcohol is 

A) Maltase B) Zymase
C) Diastase D) Invertase
 
Answer & Explanation Answer: B) Zymase

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Q:

The presence or absence of hydroxy group on which carbon atom of sugar differentiates RNA and DNA ?

A) 4th B) 2nd
C) 3rd D) 1st
 
Answer & Explanation Answer: B) 2nd

Explanation:

RNA has hydroxy group attached at the 2nd C-atom while DNA does not.

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