For the reaction H2(g)+Br2(g)→2HBr(g) the experimental data suggested that r=k[H2][Br2]1/2The molecularity and order of the reaction are respectively:

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2, 3/2

3/2, 3/2

Not defined, 3/2

1, 1/2

answer is C.

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Detailed Solution

H2(g)+Br2(g)→2HBr(g)r=k[H2][Br2]1/2Molecularity → not defined. (∵ complete reaction )order=1+12=32