Q.

A substance ‘X’ reacts with dilute nitric acid to produce a colorless gas.  This gas is dissolved in 
water to form a solution with pH value less than 7.  Identify the substance ‘X’
 

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a

Sodium Chloride

b

Sodium Hydroxide

c

Sodium Oxide

d

Sodium Carbonate 

answer is D.

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Detailed Solution

Sodium Carbonate on reaction with dilute nitric acid produces CO2 gas.  This gas dissolves in water to produce carbonic acid whose pH is less than seven.
 

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