Question

Assertion: Electron gain enthalpy always becomes less negative as we go down a group in Modern periodic table.
Reason: The size of the atom increase on going down the group in Modern periodic table and the added electron would be farther from the nucleus.
A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If the assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.

Answer 1

Correct Answer - D
`S-1`: Electron gain enthalpy does not always become less negative as we go down a group in Modern periodic table.
Ex. `Delta H_(eg)(2p series) lt DeltaH_(eg)(3p series)`.