Which of the following is the correct equation for “ A colourless lead salt, when heated, produces a yellow residue and brown fumes”?

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

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

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

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

answer is A.

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Detailed Solution

A decomposition reaction is a type of chemical reaction that results in the formation of two or more products from a single source. Lead nitrate is an inorganic white powder with a chemical formula. Lead oxide, a yellow-coloured oxide of lead, brown-coloured nitrogen dioxide gas, and colourless oxygen gas are produced when lead nitrate decomposes.
The reaction involved is-
2Pb(NO₃)₂(s) + heat → 2PbO(s) + 4NO₂(g) + O₂(g)

The balanced equation is

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

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