Assertion :The overall order of the reaction is the sum of the exponents of all the reactants in the rate expression. Reason: There are many higher order reactions.
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 C Assertion is correct but Reason is incorrect The overall order of the reaction is the sum of the exponents of all the reactants in the rate expression.
For example, for a reaction mA+nB→C, the overall order of the reaction is m+n.
with rate law expression rate =[A]m[B]n
There are very few higher-order reactions. This is because the probability of 3 or more molecules colliding at the same time is rare.