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Q:

___ is used to control the fission reaction rate in a nuclear reactor as it absorbs neutrons without itself getting into fissioning.

 

A) Heavy water B) Graphite
C) Water D) Calcium
 
Answer & Explanation Answer: D) Calcium

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Q:

NaCl is a salt which is made up of

A) Strong acid and weak base B) Weak acid and weak base
C) Strong acid and strong base D) Weak acid and strong base
 
Answer & Explanation Answer: C) Strong acid and strong base

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Q:

Researchers at the University of Illinois have discovered new form of matter called Excitonium which was coined by ______ in the 1960’

A) Bertrand Halperin B) Eugene Wigner
C) Paul Dirac D) Felix Bloch
 
Answer & Explanation Answer: A) Bertrand Halperin

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Q:

The most active ingredient in bleaching powder is

A) Iodine B) Calcium hypochlorite
C) Nitric acid D) Ammonium sulphate
 
Answer & Explanation Answer: B) Calcium hypochlorite

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Q:

Which is the first metallic element in the Modern Periodic Table?

A) Li B) Na
C) He D) H2
 
Answer & Explanation Answer: A) Li

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Q:

The gas evolved when sodium carbonate reacts with hydrochloric acid is

A) Hydrogen B) Chlorine
C) Hydrogen Chloride D) Carbon dioxide
 
Answer & Explanation Answer: D) Carbon dioxide

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Q:

Which one of the following oxides of Nitrogen is also known as Laughing Gas?

A) NO2 B) N2O5
C) NO D) N2O
 
Answer & Explanation Answer: D) N2O

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Q:

Which one of the following is lyophilic colloid?

A) Gold sol B) Smoke
C) Cloud D) Starch aqueous solution
 
Answer & Explanation Answer: D) Starch aqueous solution

Explanation:

Starch aqueous solution is a lyophilic colloidal solution.

 

Lyophilic colloids are liquid loving colloids.  When these colloids are mixed with suitable liquid high force of attraction exists between colloidal particles and liquid.

 

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