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Question

Assertion :Statement-I : The order of reaction can have fractional value
Reason: Statement-II : For an elementary reaction, the partial orders are determined by the reaction stoichiometry.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Order of reaction is experimentally determined and can be fractional.
For example:
2HgCl2(aq)+C2O24(aq)2Cl(aq)+2CO2(g)+Hg2Cl2(s)
has the observed rate equation[2]
r=k[HgCl2]1[C2O24]2
For an elementary reaction, the partial orders are determined by the reaction stoichiometry.
Hence, option B is correct

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