Question

Which of the following is not Lewis base?

• A. $A{g}^{+}$
• B. $H_{2}O$
• C. $C{N}^{-}$
• D. $RN{H}_2$

Answer 1

The correct option is A $A{g}^{+}$

Lewis base is one which donates a lone pair.
So the molecule which cannot donate electron is not a Lewis base i.e. molecule not having a lone pair.
Since $A{g}^{+}$ don't have a lone pair to donate it is not the Lewis base.