Question

What is the colour of fumes involved when Lead Nitrate crystals are heated ? Also name the gas making the fumes.​

Answer 1

ANSWER:

Color of fumes - BROWN

Name of the gas - NITROGEN DIOXIDE

EXPLANATION:

When lead nitrate is heated strongly it breaks down to form simpler substances like lead monoxide,nitrogen dioxide and oxygen.In this decomposition reaction the colourless compound lead nitrate forms a yellow compound lead monoxide and brown fumes of nitrogen dioxide gas are evolved.

2Pb(NO3)2 → 2PbO + 4NO2 + O2

Lead(II) Nitrate = Lead(II) Oxide + Nitrogen Dioxide + Dioxygen

                                                  [DECOMPOSITION REACTION]