Question

A compound p when heated in dry test tube evolves reddish brown gas q song with colourless, odourless gas r and a residue which is reddish brown when hot. Identify p,q,r,s

Answer 1

Answer:

lead nitrate. heating of lead nitrate leads to the formation of No2 (nitrogen dioxide) which is brown gas.

2 Pb(NO3)2(s) + heat → 2 PbO(s) + O2(g) + 4 NO2 (g, brown)

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