Assertion (A) Fluorine has smaller negative electron gain enthalpy than chlorine. Reason (R) The electron-electron repulsion is higher in chlorine than in fluorine.

Question

Assertion (A) Fluorine has smaller negative electron gain enthalpy than chlorine. Reason (R) The electron-electron repulsion is higher in chlorine than in fluorine., Both A and R are correct and R is the correct explanation of A ., Both A and R are correct and R is the correct explanation of A ., A is correct but R is incorrect., A is incorrect but R is correct.

MARKS App · Accepted Answer

(A) is correct but (R) is incorrect. Due to small size of fluorine, the electronic repulsions in fluorine are higher as compared to chlorine with larger size. Hence, the incoming electron does not experience much attraction due to which the electron gain enthalpy is less negative.

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