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Question

A hypothetical reaction $$A_{2}+B_{2} \rightarrow 2AB$$ follows the following mechanism.
$$A_{2}\rightarrow A+A \left(fast\right)$$
$$A+B_{2}\rightarrow AB+B \left(slow\right)$$
$$A+B\rightarrow AB \left(fast\right)$$
The order of the overall reaction is

A
$$2$$
B
$$3/2$$
C
$$0$$
D
$$1$$
Solution
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Correct option is D. $$3/2$$

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