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Synthesis of Ethers

The following...

Question

The following mechanism has been proposed for the reaction of NO with $B r_{2}$ to form NOBr :

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Solution

The correct option is A 2
$R = K [N O B r_{2}] [N O] . . . . (i) K_{c} = \frac{[N O B r^{2}]}{[N O] [B r_{2}]} . . . (i i)$
From (i)
$R = K . K_{c} [N O] [B r_{2}] [N O] R = K K_{c} [N O]^{2} [B r_{2}]$

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B r_{2}

N O_{(g)} + B r_{2_{(g)}} ⇌ N O B r_{2 (g)} N O B r_{2 (g)} + N O_{(g)} \to 2 N O B r_{(g)}

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{N O}_{(g)} + {B r}_{2 (g)} f a s t ⇌ {N O B r}_{2 (g)}

N O {B r}_{2 (g)} + {N O}_{(g)} s l o w ⇌ 2 {N O B r}_{(g)} .

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{N O}_{(g)} + {B r}_{2} (g) f a s t ⇌ {N O B r}_{2 (g)}

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{NOBr}_{2} + NO \to 2 NOBr (slow)

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NO + {Br}_{2} ⇌ {NOBr}_{2}

{NOBr}_{2} + NO \to 2 NOBr (slow)

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