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Arrange the following in increasing order of their covalent character. a. CaF2 b. CaCl2 c. CaBr2 d. CaI2 Choose the correct answer from the option given below.

1. a < b < c < d
2. a < b < d < c
3. a < b < d < c
4. a < c < b < d

Correct answer: a < b < d < c

Solution

Covalent character increases with the size of the anion and the polarizability of the bond. As we move from fluoride to iodide, the anion size increases, leading to greater covalent character in the order of CaF2, CaCl2, CaI2, and CaBr2.

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