Assertion (A): Ionisation potential of K is numerically the same as electron affinity of `K^(+)`
Assertion (R): Ionisation potential and electron affinity both depend on screening effect

Answer

B

Explanation

Ionization enthalpy of K can be depicted by the enthalpy change of reaction `K(g)rarrK^(+)(g)+e^(-)`, while electron affinity of `K^(+)` can be represented by `K^(+)(g)+e^(-)rarrK(g)`. Hence Statement-1 is true.
Numerical values of both ionization energy and electron affinity decrease as the screening effect increases. Although Statement-2 is true but it not the correct explanation of Statement-1.