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Decomposition Reaction

A colourless ...

Question

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

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Solution

(a) Lead salt is lead nitrate.

(b) The brown fumes is nitrogen dioxide gas.

(c) The chemical reaction is given as follows:

2Pb(NO₃)₂(s) → 2PbO (s) + 4NO₂(g) + O₂(g)

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