Question

A property which progressively increases down a group in the
periods table is : (a) Ionization enthalpy (b) Electronegativity
(c) Electron gain enthalpy (d) Strength as a reducing agent.

Answer 1

strength as a reducing agent increases down the group because as we move down the group electropositivity increases and hence they will be easily tend to lose electrons.
thus the elements become strong reducing agents on moving down the group.

Answer 2

A property which progressively increases down a group in theperiods table is :  (d) Strength as a reducing agent.