Question

Which of the following statement(s) is/are correct?

• A. LiNO3, Ba(NO3)2 both will give NO2 on heating
• B. i only
• C. i, ii only
• D. i, ii \& iii

Hint:

When evaluating solubility and reactivity trends in groups, remember: solubility of sulphates decreases down group 2, and nitrates often decompose on heating.

Answer 1

The Correct Option is B

% Option (i) On heating, both LiNO\textsubscript{3} and Ba(NO\textsubscript{3})\textsubscript{2} decompose to form NO\textsubscript{2} gas.
% Option (ii) BaSO\textsubscript{4} is less soluble than CaSO\textsubscript{4} in water due to its higher lattice energy.
% Option (iii) Alkaline earth metals like Ca, Sr, Ba *do* dissolve in liquid ammonia forming blue-colored solutions — so this statement is incorrect.