A certain reaction occurs in the following steps : (i) Cl(g) + O3(g)

1.	A certain reaction occurs in the following steps : (i) Cl(g) + O3(g) → ClO(g) + O2(g) (ii) ClO(g) + O(g) → Cl(g) + O2(g) (a) Write the chemical equation for overall reaction. (b) Identify the reaction intermediate. (c) Identify the catalyst. (d) What is the molecularity of each step?
Answer» Step I : Cl_(g) + O_3(g) → ClO_(g) + O_2(g) Step II : ClO_(g) + O_(g) → Cl(g) + O_2(g) (a) Overall reaction is obtained by adding both the reactions. O_3(g) + O_(g) → 2O_2(g) (b) Reaction intermediate is ClO_(g) which is formed in the first step and removed in the second step. (c) Cl_(g) acts as a catalyst. It is an example of homo-geneous catalysis in which catalyst Cl_(g) forms an intermediate ClO_(g) and again is released in the second step. (d) Since both the steps involve two reactants each, both the steps are bimolecular.

A certain reaction occurs in the following steps : (i) Cl(g) + O3(g) → ClO(g) + O2(g) (ii) ClO(g) + O(g) → Cl(g) + O2(g) (a) Write the chemical equation for overall reaction. (b) Identify the reaction intermediate. (c) Identify the catalyst. (d) What is the molecularity of each step?

Answer»

Step I : Cl_(g) + O_3(g) → ClO_(g) + O_2(g)

Step II : ClO_(g) + O_(g) → Cl(g) + O_2(g)

(a) Overall reaction is obtained by adding both the reactions.

O_3(g) + O_(g) → 2O_2(g)

(b) Reaction intermediate is ClO_(g) which is formed in the first step and removed in the second step.

(c) Cl_(g) acts as a catalyst. It is an example of homo-geneous catalysis in which catalyst Cl_(g) forms an intermediate ClO_(g) and again is released in the second step.

(d) Since both the steps involve two reactants each, both the steps are bimolecular.

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