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Nucleophilic Substitution in Alkyl Halides

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slow step of cine substitution reaction

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X S t e p I - -- \to Y S t e p I I - --- \to Z

is a complex reaction. Total order of reaction is 2 and step II is slow step. What is molecularity of step II?

S_{N} A r

i.e. Substitution Nucleophilic aromatic reaction, the rate determining step(s) is/are:

3 C l O^{-} \to C l O_{3}^{-} + 2 C l

occurs in following two steps.
I.

C l O^{-} + C l O^{-} K_{1} - \to C l O_{2}^{-} + C l^{-}

(Slow step)
II.

C l O_{2}^{+} C l O^{-} k_{2} - \to C l O_{3}^{-} + C l^{-}

(Fast step)
Then, the rate of given reaction is:

Q. A chemical reaction procceds into the following steps,
Step I,

2 A ⇌ X (f a s t)

X + B \to Y (s l o w)

Y + B A ⇌ X [P r o d u c t] (f a s t)

The rate law for the overall reaction is:

Q. The reaction

A_{2} + B_{2} \to 2 A B

occurs in the following steps

A_{2} \to A + A

A + B_{2} \to A B + B

A + B \to A B

(fast)
The order of reaction is:

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Nucleophilic Substitution in Alkyl Halides

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