Question

Which one of the following molecular hydrides acts as a lewis acid?

• A. ${CH}_4$
• B. ${NH}_3$
• C. $H_{2}O$
• D. $B_2{H}_6$

Answer 1

The correct option is A ${CH}_4$

Electron-deficient molecules behave as Lewis acid. Among the given molecules, only diborane is the electron deficient, it does not have the complete octet. Hence it behaves like a Lewis acid.