Which of the following is incrrect ?

Options

A. Alkaline earth metals like alkali metals have high electrical and thermal conductivities.
B. Alkaline earth metls are more electropositive (or metallic) than alkali metals.
C. The electropositive (or metallic) character of alkaline earth metals increases down the group.
D. None of these

Answer

B

Explanation

On account of relatively low ionization enthalpies, group 2 elements have a strong tendency to lose both the valence electrons forming dipositive cations. Hence, they show strong electropositive character which increases on going down the group because of decrease of ionization enthalpies.
However, group 2 elements are less electropositive than group 1 elements because total energy required to yield gaseous `M^(2+)` ions for group 2 elements is over four times greater than the energy required to yield `M^(+)` ions for group 1 elements.