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Chemistry

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

Nitric Acid

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Answer

Reddish brown nitrogen dioxide gas is evolved.

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

Pb(NO3)2Δ2PbO+O2+4NO2\text{Pb(NO}3)2 \xrightarrow{\Delta} 2\text{PbO} + \text{O}2 + 4\text{NO}2

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