Chemistry - CHEMICAL BONDING Question with Solution | TestHub

In alkali metal nitrates, thermal stability increases down the group due to a decrease in the polarizing power of cations. Hence, LiNO₃ is less stable than NaNO₃, so (B) is correct and (A) is wrong.

According to Fajan’s rule, a smaller cation with higher polarizing power increases covalent character. Since Ag⁺ has higher polarizing power than K⁺, AgCl is more covalent than KCl, so (C) is correct and (D) is wrong.