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A hypothetical reaction A(2) + B(2) to 2...

A hypothetical reaction `A_(2) + B_(2) to 2AB` follows the mechanism as given below
`A_(2) to A + A` (fast)
`A + B_(2) to AB + B` (slow)
`A +B to AB` (fast)
The order of the over all reaction by RDS method is:

A

2

B

1

C

`3/2`

D

0

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