Question

Rates of nitration of benzene and hexadeuterobenzene are different. $C - H$ 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

Answer 1

Answer: (D)

If both assertion and reason are false

Answer 2

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.