Question

A gas which turns lead nitrate solution blue black

Answer 1

nitrogen dioxide is the answer

Answer 2

Let us identify the gas

Explanation:

Lead nitrate

Its molecular formula is Pb(NO₃)₂.

It is formed when lead with valency +2 reacts with nitrate that is NO₃⁻ reacts .

The ionic bond formation takes place .

When this lead nitrate is heated it decomposes to form lead oxide and nitrogen dioxide and oxygen gas .

The reaction involved is : Pb(NO₃)₂-------> PbO + NO₂ + O₂

The gas that turns it blue black is recognized as : Nitrogen dioxide