1.

Assertion (A): PhBr is less reactive thanC_(2)H_(5)Br towards SN reactions. Reason (R):The forces of attrafction between RX and H_(2)O molecules are weaker than thosepresent betweenthe molecules of RX and water molelcules separate,u.

Answer»

Both `(A)` and `(R)` are true and `(R0` is the CORRECT explanation of `(A)`.
Both `(A)` and `(R)` are true but `(R)` is not the correct explanation of `(A)`.
`(A) is true but `(R)` is false.
`(A) is falsebut `(R)` is true.

Solution :Correct explanation:
Due to RESONANCE `(C-Br)` bond in `PhBr` is a little stronger than `(C-Br)` bond in `C_(2)H_(5)Br`


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