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Reaction Quotient

A reaction ...

Question

A reaction $A_{2} + B_{2} \to 2 A B$ occurs by the following mechanism:
$A \to A + A . . .$ (slow)
$A + B_{2} \to A B + B . . .$ (fast)
A + B $\to$ AB... (fast)
Its order would be:

A

3/2

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B

1

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C

Zero

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D

2

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Solution

The correct option is A 1
Slowest step is
$A_{2} \to A + A$ (slow)
Hence, r = $k [A_{2}]$
Therefore, OR = 1

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