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Question

Pure Nitrogen can be obtained by passing ammonia vapours over heated copper (II) oxide (CuO) – True or False?

A
True
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B
False
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Solution

The correct option is A True
Ammonia reacts with copper (II) oxide to form pure nitrogen.
2NH3(g)+3CuO(s)N2(g)+3Cu(s)+3H2O(g)
Pure Nitrogen can also be preparing the thermal decomposition of azides, which can be prepared as:
N2O+2NaNH2
NaN3+NaOH+NH3
When heated, sodium azide gives
2NaN32Na+3N2
Further, in the laboratory, N2 can be obtained by the thermal decomposition of Ammonium dichromate. Can you try that reaction? A hint is that Chromium (III) oxide is one of the products.

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