Question

Assertion : Fatom has less negative electron gain enthalpy than Cl atom.
Reason: Additional electrons are repelled more effectively by 3p - electrons in Cl than by 2p - electrons
in F atom
Both assertion and reason are true and reason is the correct explanation of assertion.
Both assertion and reason are true but reason is not the correct explanation of assertion.
Assertion is true but reason is false.
Both assertion and reason are false.​

Answer 1

Explanation:

In general, the electron affinity decreases down the group but the electron affinity for chlorine is more than that for fluorine, because in F, due to the small size of the atom, the electrons are already crowded. Entry of one more electron results in more repulsion, which leads to absorption of some energy released is less than what is expected

So assertion is correct but reason is incorrect