**viii.** The elementary reaction $\mathrm{O_3(g) + O(g) \longrightarrow 2\ O_2(g)}$ is a. unimolecular and second order b. bimolecular and first order c. bimolecular and second order d. unimolecular and first order

**viii.** The elementary reaction mathrmO₃(g) + O(g) longrightarrow 2O₂(g) is a. unimolecular and second order

Choose the most correct option · Q8

\mathrm{O_3(g) + O(g) \longrightarrow 2\ O_2(g)}

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Step 1. The elementary reaction is $O_3(g)+O(g)\rightarrow 2O_2(g)$ .

Step 2. Two reactant molecules ( $O_3$ and $O$ ) collide and react, so the molecularity is 2 (bimolecular).

Step 3. For an elementary reaction, the rate law follows directly from stoichiometry: $\text{rate}=k[O_3][O]$ , first order in each, giving overall order $1+1=2$ (second order). …

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Q.viii. The elementary reaction $\mathrm{O_3(g) + O(g) \longrightarrow 2\ O_2(g)}$ is a. unimolecular and second order
b. bimolecular and first order
c. bimolecular and second order
d. unimolecular and first order

Concept understanding — Molecularity

Q.viii. The elementary reaction O3(g)+O(g)⟶2 O2(g)\mathrm{O_3(g) + O(g) \longrightarrow 2\ O_2(g)}O3​(g)+O(g)⟶2 O2​(g) is a. unimolecular and second order b. bimolecular and first order c. bimolecular and second order d. unimolecular and first order

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Q.viii. The elementary reaction $\mathrm{O_3(g) + O(g) \longrightarrow 2\ O_2(g)}$ is a. unimolecular and second order
b. bimolecular and first order
c. bimolecular and second order
d. unimolecular and first order

Unlock everything free for 14 days