Assertion: lonization potential of K is numerically the same as electron affinity `K^(+)`
Reason : I.E. and E.A. both depends on screeing effect.

Options

A. If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
B. If both (A) and (R) are correct, but (R) is not the correct explanation of (A)
C. If (A) is correct, but (R) is incorrect.
D. If both (A) and (R) are incorrect.

Answer

B

Explanation

Ionization enthalpy of K. can be depicted by the enthalpy change for the process ` K(g) to K^(+)(g)+e^(-) ` while electron affinity of `K^(+)` can be represented by `K^(+)(g)+e^(-) to K(g)`. Numerical values of both ionization energy and electron affinity decreases as the screening effect increases.