CBSE 2024 · Region 1 · Set 2 · Q6 · 1 mark

A reaction $\displaystyle \mathrm{A}_{2}+\mathrm{B}_{2} \longrightarrow 2 \mathrm{AB}$ occurs by the following mechanism : \[\begin{aligned} & \mathrm{A}_{2} \rightarrow \mathrm{~A}+\mathrm{A} \text { (slow) } \\ & \mathrm{A}+\mathrm{B}_{2} \rightarrow \mathrm{AB}+\mathrm{B} \text { (fast) } \\ & \mathrm{A}+\mathrm{B} \rightarrow \mathrm{AB} \text { (fast) } \end{aligned} \] Its order would be :

CBSE Class 12 Chemistry past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.