JEE PYQ: S Block Elements Question 23
Question 23 - 2019 (08 Apr Shift 2)
The covalent alkaline earth metal halide ($\text{X} = \text{Cl, Br, I}$) is:
(a) $\text{MgX}_2$ (b) $\text{CaX}_2$ (c) $\text{BeX}_2$ (d) $\text{SrX}_2$
Show Answer
Answer: (c)
Solution
According to Fajan’s rule, greater the polarising power of cation, greater would be the covalent character. Since $\text{Be}^{2+}$ has maximum polarising power among the given cations, $\text{BeX}_2$ would be the most covalent alkaline earth metal halides.
BETA
