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Question

The compound(s) which generate(s) N2 gas upon thermal decomposition below 300oC is (are):

A
NH4NO3
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B
(NH4)2Cr2O7
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C
Ba(N3)2
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D
Mg3N2
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Solution

The correct option is C Ba(N3)2
(a) NH4NO3N2O+2H2O(N2O can further decompose to N2) and O2 at temperature above 300oC)
(b) (NH4)2Cr2O7N2+Cr2O3+4H2O
(c) Ba(N3)23N2+Ba
(d) Mg3N2 does not decompose at any temperature.

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