Question

Select the metals (in List I) with the specific properties of the compounds (in List II).

Answer 1

(A) Li has small size and large heat of hydration. Hence it has most negative standard electrode potential in the periodic table.
(B) Sodium carbonate is thermally stable and it does not decompose even on heating to red hot.
(C) When potassium is burnt in excess of oxygen, potassium superoxide is formed.
$K+\left(excess\right)O_2\stackrel{burn}{\to }\left(superoxide\right)K{O}_2$
(D) Beryllium chloride $BeC{l}_2$ is a lewis acid. It can accept electrons in empty p orbital. It catalyzes friedel crafts reaction.
(E) The chlorides of Mg and Be do not impart any color to the flame.