Question

Which of the following does not form alum :

• A. $L{i}^{+}$
• B. $N{a}^{+}$
• C. $K^{+}$
• D. $N{H}_4^{+}$

Answer 1

The correct option is A $L{i}^{+}$

Theory Based. Due to small size $L{i}^{+}$ doesnot form alums, as it is too small to stay in its lattice position.