Question

The brown gas evolved on heating of copper nitrate is
(a) O2
(b) NO2
(c) N2
(d) NO

Answer 1

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Option (B) NO2✌....

Answer 2

Concept:

Chemical Reactions and Experimental Techniques

Given

Copper Nitrate is heated

Find

Gas evolving

Solution

When copper nitrate heated first heat losses the water molecule, on further heating it decomposes to give reddish brown gas Nitrogen dioxide and oxygen.The greenish blue crystals of copper nitrate will change to black residue of copper oxide and give reddish brown gas i.e., nitrogen dioxide on heating.

Hence th gas eloving is Nitrogen Dioxide,and correct option is B

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