Question

A white crystalline salt on heating produces a crackling sound and gives a colourless,

odourless gas which supports combustion followed by evolution of a reddish brown gas

with pungent smell. A yellow solid is left behind after the reaction. Identify the salt and

write a balanced chemical equation for the reaction.​

Answer 1

Explanation:

Lead nitrate is the white crystalline salt. When it is heated, it makes a crackling noise and produces 2 gases NO2 & NO3. The colour of NO2 gas is reddish-brown.

Answer 2

Answer:

The white crystalline salt is Pb(NO3)2 ( lead nitrate)

on heating.. it produces crackling sound due to presence of oxygen gas. The reddish brown gas is of Nitrogen dioxide and the colourless gas is of oxygen. A yellow precipitate of lead oxide is formed.

2Pb(NO3)2→2PbO+4NO2+O2

hope it helps..