Question

When lead nitrate is heated, it breaks down into lead monoxide, nitrogen dioxide, and oxygen?
$2\text{Pb}{{\left( \text{N}{{\text{O}}_{\text{3}}} \right)}_{2}}\to 2\text{PbO + 4N}{{\text{O}}_{\text{2}}}+{{\text{O}}_{2}}$
The reaction is an example of:
A.Combustion reaction
B.Decomposition reaction
C.Double decomposition reaction
D.Displacement reaction.

Answer 1

Combustion is burning of a substance in oxygen, while decomposition is the disintegration of that substance, double decomposition is the disintegration of two substances together while displacement means replacing one ion with the other.

Complete Step by step Solution:
When any chemical compound undergoes reaction with oxygen, then it is said to have undergone combustion. The decomposition of the reactants means the breaking down of a compound into simpler molecules. Double decomposition takes place when two substances together react and decompose to form new simpler products. In Displacement reactions, one or more ions in the one of reactants is replaced by displaced by the ions of the other reactant,
From the above reaction, it is clear that lead nitrate decomposes to form three different products, lead oxide, nitrogen dioxide, and oxygen. As there is no other reactant involved, so the reaction is a simple decomposition reaction.

Hence, the correct answer to the above question is option B.

Notes: Most of the decomposition reactions require an input of energy for the reaction to proceed. This energy can be in the form of heat, light, or electricity. This energy is required to break the bonds of the compound that undergoes decomposition and is released back in the formation of the molecules as the bond formation energy.