JEE Main 2022 · 26 Jul · Shift 2 · Chemistry Q62

ChemistrySingle correct+4 / -1Question 62 of 90

Arrange the following in increasing order of their covalent character.

A. $\mathrm{CaF_2}$
B. $\mathrm{CaCl_2}$
C. $\mathrm{CaBr_2}$
D. $\mathrm{CaI_2}$

Choose the correct answer from the options given below.

B < A < C < D

A < B < C < D

A < B < D < C

A < C < B < D

Answer and worked solution

Official answer: B

Fajans' rules. Same cation, so covalent character grows with anion size (polarisability): $\mathrm{F^-<Cl^-<Br^-<I^-}$ .

A < B < C < D. (B)

JEE Main 2022 · 26 Jul · Shift 2, Chemistry question 62