Question

Which is not characteristic of $\pi$-bond?

• A. $\pi$ - bond is formed when a sigma bond already formed
• B. $\pi$ - bond are formed from hybrid orbitals
• C. $\pi$ - bond may be formed by the overlapping of p-orbitals
• D. $\pi$ - bond results from lateral overlap of atomic orbitals

Answer 1

The correct option is B $\pi$ - bond are formed from hybrid orbitals

$\pi$- bonds are formed from unhybridized orbitals.
Thus in ethylene, unhybridized $2p$ orbital of one $C$ atom overlaps with unhybridized $2p$ orbital of second $C$ atom to form $\pi$- bond.