Question

12. Assertion :- If the hydrogen atoms of benzene
are replaced by deuterium atoms then the reactivity
of benzene ring is decreased for ESR.
Reason :- The bond strength of C-D is more than
C-H and reaction depends on the bond strength
of C-D and C-H.
(1) A (2) B
(3) C
(4) D​

Answer 1

Answer:

The bond strength of C-D is more than C-H, so reaction depends on the bond strength of C-D and C-H. A . Both Assertion and Reason