Question

Molecular formula of the chloride of an element ‘X’ is XCl2 . This compound is a solid. Which of the
following element be present in the same group as ‘X’​

Answer 1

Explanation:

As XCl is the compound this means that valency of X is +1.

thus it can be hydrogen or any other alkali metals.

but HCl is not solid.

thus the X is the element of alkali metal group.

X can be lithium,sodium.potassium,rubidium or cesium.