Question

On heating white crystals of lead (ll) nitrate in a boiling lead oxide, oxygen gas and a brown gas X is formed.
Write a balanced chemical equation of the reaction.
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Answer 1

Explanation:

When white crystals of lead nitrate $\sf{(Pb(NO_3)_2})$ is heated, it undergoes decomposition reaction.

It gives lead oxide $\sf{(PbO)}$, oxygen gas $\sf{(O_2)}$ and a brown gas i.e. nitrogen dioxide $\sf{(NO_2)}$.

Balanced equation is as follows:

$\sf{2Pb(NO_3)_{2}-->2PbO+4NO_2+O_2}$

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Extra Information

Decomposition reaction:

Its a type of chemical reaction in which one conpound breaks down to give two or more products.

Types of decomposition reaction:

•Thermal decomposition:

Decomposition caused by heat.

(The above reaction is also an example thermal decomposition)

Example

$\sf{CaCO_3-->CaO+CO_2}$

•Electrolytic decomposition:

Decomposition caused by electricity

Example

$\sf{2H_2O-->2H_2+O_2}$

•Photo decomposition:

Decomposition caused by sunlight

Example

$\sf{2AgBr-->2Ag+Br_2}$