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Chemistry
Problem Mechanism of the reaction 2 NO + Cl 2 → 2 NOCl 2\text{NO} + \text{Cl}_2 \rightarrow 2\text{NOCl} 2 NO + Cl 2 → 2 NOCl may be written as
2 NO ⇌ k k ′ ( NO ) 2 … … … … (fast) 2\text{NO} \underset{k'}{\overset{k}{\rightleftharpoons}} (\text{NO})_2 \quad \dots\dots\dots\dots \text{(fast)} 2 NO k ′ ⇌ k ( NO ) 2 ………… (fast)
( NO ) 2 + Cl 2 → k 2 NOCl … … … … (slow) (\text{NO})_2 + \text{Cl}_2 \xrightarrow{k} 2\text{NOCl} \quad \dots\dots\dots\dots \text{(slow)} ( NO ) 2 + Cl 2 k 2 NOCl ………… (slow)
Rate equation would be
(A) k K [ ( NO ) 2 ] [ Cl 2 ] kK[(\text{NO})_2][\text{Cl}_2] k K [( NO ) 2 ] [ Cl 2 ]
(B) k K [ NO ] 2 [ Cl 2 ] kK[\text{NO}]^2[\text{Cl}_2] k K [ NO ] 2 [ Cl 2 ]
(C) k K [ Cl 2 ] kK[\text{Cl}_2] k K [ Cl 2 ]
(D) k K [ NO ] [ Cl 2 ] kK[\text{NO}][\text{Cl}_2] k K [ NO ] [ Cl 2 ]
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