Question

. In which one of the following compound, the percentage
ionic character in the bonds is least.
1) MgS 2) MgCl2
3) NaCl
4) Na2S​

Answer 1

Answer:

Correct option is (3) NaCl

According to Fajan's Rule, Greater is the charge on the cation, greater will be the covalent character in the bond. Since, NaCl has low charge on cation(Na+) it has the most ionic character.

Hope this is helpful for you....

Answer 2

Answer:

1) MgS  

Explanation:

According to Fazan's rule, the smaller cation, larger anion, and more charge-containing ions have a more covalent character.

The least percentage of ionic character in the bonds means more covalent character in the bonds.

There two possible cations in the options are Mg²⁺ and Na⁺. The Mg²⁺ is the smallest cation, hence options 3 and 4 are eliminated. The anions in options 1 and 2 are S²⁻ and Cl⁻. S²⁻ is a larger anion than Cl⁻. Hence, MgS has the most covalent and least ionic character percentage.

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