Question

A mechanism for the decomposition of ozone is (2 O3 → 3 O2). O3 ⇌ O2 + OO + O3 → O2 + O2What is the molecularity for the first and second elementary reactions?a. 2 and 1b. 1 and 1c. 1 and 2d. 2 and 2e. None of these

Answer 1

The correct answer is option c.

Step-by-step explanation:

Molecularity is defined as number of atoms , ions or molecules that must collide with one another so as to result in a chemical reaction.It is simply the sum of molecules of different reactants as represented in balanced chemical equation.

Reaction taking place in one step are said to be elementary reaction.

Reaction taking place in more than one step are said to be complex reaction.

A mechanism for the decomposition of ozone is given as:

1)
`O_3 \rightarrow O_2 + O`

Molecularity for the first elementary reaction is 1. This because single ozone molecule is present.

2)
`O + O3\rightarrow O_2 + O_2`

Molecularity for the second elementary reaction is 2. This because single ozone molecule reacts with 1 oxygen atom.