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Question

Pure N2 can be obtained by heating________.

A
NH3 with CuO
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B
NH4NO3
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C
(NH4)2Cr2O7
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D
Ba(N3)2
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Solution

The correct option is D Ba(N3)2
Barium azide can also be used in the preparation of extra pure nitrogen on heating.
Ba(N3)2Ba+3N2

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