Question

Which of the following is not a Lewis base?

• A. $ N{{H}_{3}} $
• B. $ {{H}_{2}}O $
• C. $ AlC{{l}_{3}} $
• D. None of these

Answer 1

Answer: (C)

Key Idea: Lewis bases are electrons rich compounds. (i) $ \overset{\bullet \bullet }{\mathop{N}}\,{{H}_{3}} $ and $ {{H}_{2}}\underset{\bullet \,\bullet }{\overset{\bullet \,\bullet }{\mathop{O}}}\, $ are Lewis bases because they have lone pair of electron. (ii) $ AlC{{l}_{3}} $ is Lewis acid because it can accept electrons.