The colour of residue left behind on heating lead nitrate when it is still hot is:(1) green (2) yellow(3) black (4) reddish brown

Academic Chemistry NCERT Class 9

Correct Answer: (2) yellow

Explanation: On heating lead nitrate, it decomposes into simpler substances, they impart different colour to the solution.

$2Pb(NO_3)_2 → 2PbO + 4NO_2 + O_2$

colourless yellow ppt brown fumes

Due to the formation of PbO, it shows yellow colour.

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Updated on: 10-Oct-2022

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