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Law of Conservation of Mass

A colourless ...

Question

A colourless lead salt, when heated, produces a yellow residue and brown fumes.
Write a chemical equation of the reaction involved.

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Solution

The colorless lead salt will be lead nitrate $P b (N O_{3})_{2}$ . On heating, it forms lead oxide & brown fumes of $N O_{2}$ gas liberate.
The equation is given by,
$2 P b (N O_{3})_{2} ⟶ 2 P b O + 4 N O_{2} ↑ + O_{2}$

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