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


Correct answer: (3) yellow residue of PbO 

Explanation: When solid lead nitrate is heated, a yellow residue (lead oxide) is obtained, along with brown colored gas (nitrogen dioxide), and oxygen is liberated.

The chemical equation for the above reaction is given below:

$2Pb(NO_3)_2→2PbO + 4NO_2 + O_2$

Updated on: 10-Oct-2022

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