Assertion (A) Fluorine has smaller negative electron gain enthalpy than chlorine. Reason (R) The…
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.
Solution
(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.