According to Fajans' rules, which of the following alkaline earth metal halides exhibits the highest — s Block Elements Chemistry Question

💡 Solution & Explanation

Covalent character is favored by a small cation with high charge (high polarizing power). $Be^{2+}$ is the smallest ion in Group 2, giving $BeCl_2$ intense polarizing power and making it predominantly covalent. Consequently, it readily dissolves in non-polar or moderately polar organic solvents like ethanol.