Question

A white compound on heating decomposes to give brown fumes and a yellow residue is left behind. Name the compound write the chemical eqn of the reaction stating its type

Answer 1

the compound is lead nitrate.
equation:- 2Pb(NO₃)₂ -----> 2PbO + 4NO₂ + O₂
decomposition reaction

Answer 2

Answer :

A white compound is, lead nitrate

Brown fumes molecule is, nitrate

Yellow residue is, lead oxide

The balanced chemical reaction will be,

$2Pb(NO_3)_2\rightarrow 2PbO+4NO_2+O_2$

Explanation :

When a white compound (lead nitrate) on heating decomposes to give brown fumes of nitrate and a yellow residue of lead oxide is left behind.

The chemical equation of the reaction will be :

$2Pb(NO_3)_2\rightarrow 2PbO+4NO_2+O_2$

This reaction is a thermal decomposition reaction in which on heating the larger molecule decompose to give two or more smaller molecules. Hence, the name of the compounds are,

A white compound is, lead nitrate

Brown fumes molecule is, nitrate

Yellow residue is, lead oxide