and are correct.

(i) For salts, order of covalent character is as follows:

(ii) Lithium has small size compared to sodium. Hence, it is less likely for to donate an electron to form ionic bond. Hence salts are more covalent.

(iii) Due to inert pair effect is more ionic while being in +4 oxidation state shows more covalent character due to smaller size of (IV).

(iv) As we move left to right in a period, ionic character decreases, hence .

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