Question

A student while heating solid lead nitrate taken in a test-tube would observe (1) white residue of PbO2
(2) green residue of NO2
(3) yellow residue of PbO
(4) brown residue of NO

Answer 1

Answer: 3. Yellow residue of pbo

Explanation:

Answer 2

A student while heating solid lead nitrate taken in a test-tube would observe yellow residue of PbO.

Explanation:

A yellow layer of lead oxide is produced when lead nitrate is heated, and the brown colored gas, i.e. they emit nitrogen dioxide ( $NO_2$ forms when a high temperature consumes Fossil fuels, like the oil,  coal, diesel or gas) along with the emission of Oxygen gas.

The equation is as follows below

$2 Pb(NO_{3} )_2->2PbO +4 NO_2+O_2$

Therefore the correct answer is Option (3) yellow residue of PbO