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Q.

Which metal carbonate reacts with nitric acid to produce nitrogen dioxide gas?

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a

Magnesium carbonate

b

Calcium carbonate

c

Iron carbonate

d

Copper carbonate

answer is B.

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Detailed Solution

When iron carbonate (FeCO3) reacts with nitric acid (HNO3) the products form as nitrogen dioxide gas along with other side products and the reaction equation will be as below:

FeCO3 + 2HNO3 → Fe(NO3)2 + H2O + CO2 + NO2

The nitrogen dioxide gas which is produced in the reaction is brown in color.

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