Given below are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): It is difficult to replace chlorine by $- O H$ in chlorobenzene in companion to that in chloroethane.
Reason (R): chlorine carbon $(C - C l)$ bond in chlorobenzene has a partial double bond character due to resonance.

Both A and R are true and R is the correct explanation of A

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Both A and R are true but R is not the correct explanation of A

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A is true but R is false

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A is false but R is true

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Solution

The correct option is A Both A and R are true and R is the correct explanation of A
Assertion and reason both are correct and reason is the correct explanation of assertion. It is difficult to replace chlorine by $- O H$ in chlorobenzene in comparision to that in chloroethane because $C - C l$ bond in chlorobenzene has a partial bond character due to resonance.

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: In $T l I_{3}$ , isomorphous to $C s I_{3}$ , the metal is present in $+ 1$ oxidation
state.

Reason R: $T l$ metals has fourteen $f$ electrons in its electronic configuration.

In the light of the above statements, choose the most appropriate answer from the options given below:

H F

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