Which is true statement(s)?

Options

A. Large is the value of ionisation enthalpy easier is the formation of cation.
B. Larger is the value of electron gain enthalpy, easier is the formation of anion.
C. Large is the have of ionisation energy as well as electron affinity, smaller is the Muliken electronegativity of atom.
D. Large to the `Z_(eff)` large is the size of atom.

Answer

B

Explanation

(A) Larger the value of ionisation enthalpy, more difficult will be the removal of electron to form cation.
(B) Electron gain enthalpy is the measure of the ease with which an atom receives the additional electron in its valence shell in gaseous phase. So, large in the value of electron gain enthalpy, easier is the formation of anion.
(C ) Electronegativity (Mulliken) `=("Ionisation energy +Electron affinity")/(2)`
(D) As `Z_(eff)` increases, the valence shell as well as inner shells electrons are more strongly attracted by the nucleus. This causes the contraction in atomic size.