Single Choice

Which of the following has been arranged in order of increasing covalent character?

A$$KCl < CaCl_2 < AlCl_3 < SnCl_4$$
Correct Answer
B$$SnCl_4 < AlCl_3 < CaCl_2 < KCl$$
C$$AlCl_3 < CaCl_2 < KCl < SnCl_4$$
D$$CaCl_2 < SnCl_4 < KCl < AlCl_3$$

Solution

According to Fajan's Rule, small cation, large anion, higher charge value favour covalent character. Higher charge value is one of the primary factors for covalent character.

Hence, the correct order of increasing covalent character is $$KCl < CaCl_2 < AlCl_3 < SnCl_4$$

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