Question

why fumes of Brown colours are evolved when Lead Nitrate is heated​

Answer 1

HEY MATE ..

The gas that is evolvedfrom the reaction is nitrogen dioxide NO2, which is a brown or brown-yellow gas..

PLEASE FOLLOW ME....

Answer 2

$\large{\underline{\boxed{ Answer}}}$

Actually,welcome to the concept of decomposition reaction.

Decomposition reaction:-

The reaction in which a single reactant break down in to two or more simpler products by the help of heat,light and electrical energy.

There is three types of decomposition reaction :-

• Thermal decomposition reaction.
• Electrical decomposition reaction.
• Photo decomposition reaction.

The decomposition of lead nitrate is a thermal decomposition reaction :-

Pb(NO3)2 + ∆ → PbO + NO2 + NO3

where, NO2 is also known as brown fumes.

The decomposition of lead nitrate release nitrogen dioxide which is brown in colour known as brown fumes.