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ICSE Class 10 Chemistry 2023 Paper

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State one relevant observation for each of the following:
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Question : 69 of 88
Marks: +1, -0
Dry ammonia gas is passed over heated PbO\mathrm{PbO} .
Solution:  
When dry ammonia gas is passed over heated PbO\mathrm{PbO}, nitrogen gas is produced.
3PbO+2NH3→3Pb+N2↑3\mathrm{PbO}+2\mathrm{NH}_3 \rightarrow 3\mathrm{Pb}+\mathrm{N}_2\uparrow +3H2O+3\mathrm{H}_2\mathrm{O}
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