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ICSE Class 10 Chemistry Question 43 of 63

Study of Compounds — Nitric Acid — Question 43

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Question

Question 2(2013)

State two relevant observations for : Lead nitrate crys­tals are heated in a hard glass test tube.

Answer

Reddish brown nitrogen dioxide gas is evolved.

Buff coloured residue of PbO is obtained in the test tube.

Pb(NO3)2→Δ2PbO+O2+4NO2\text{Pb(NO}_3)_2 \xrightarrow{\Delta} 2\text{PbO} + \text{O}_2 + 4\text{NO}_2