Question

A compound on strongly heating evolves a reddish brown gas in the presence of which a burning splint reignites. The gas evolved may be:

विकल्प

• NO₂ only

• NO₂ and CO₂

• O₂ only

• NO₂ and O₂

Answer 1

NO₂ and O₂

Explanation:

The thermal decomposition of heavy metal nitrates (like lead nitrate) releases a mixture of reddish-brown nitrogen dioxide (NO₂) gas and oxygen (O₂), where the oxygen causes the splint to reignite.