Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: Rates of nitration of benzene and hexadeuterobenzene are different. Reason: \[C-H\] bond is stronger than \[C-D\] bond.A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C) If Assertion is true but Reason is false.
D) If both Assertion and Reason are false.
Correct Answer: D
Solution :
Rates of nitration of benzene and hexadeuterobenzene are same because the rate determining step is production of electrophile. Besides \[C-H\] and \[C-D\] bonds in benzene have equal strength. Thus, both assertion and reason are false.
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