Question

Element X forms a chloride with the formula $XC{l}_2$, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as
(a) Na
(b) Mg
(c) AI
(d) Si

Answer 1

Valency of X in the given compound is 2. Among the given elements, only Mg is present in the group 2 of periodic table. So the element X is Mg and it form the compound $MgC{l}_2$.