Question

Which cannot undergo $E_2$ reaction?

• A.
• B.
• C.
• D. None of these

Answer 1

The correct option is C

In $E_2$ reaction, there is loss of $H^{+}$ and $X^{–}$ in a single step. In (c), because of this $E_2$ reaction, one carbon would be pentavalent (which cannot be).