Question

Consider the four pairs of elements . K and O , Mg and Cl , Na and Al , C and O.
(i) Which two pairs are most likely to form an ionic bond.
(ii) What will be formulae of the ionic compounds formed.
(iii) Give any two examples of solvents in which the above ionic compounds are not soluble.​

Answer 1

The answers to the given questions are as follows:

(i) The pairs K and O & Mg and Cl are most likely to form an ionic bond.

- This is due to the large difference in the electronegativity of these elements.

(ii) The folmulae of the ionic compounds formed will be KO2 and MgCl2.

(iii) The given ionic compounds are polar in nature.

- Hence, they are insoluble in non-polar solvents like Benzene, Toluene or CCl4.