Question

Consider the following statements:
I.A sigma $\left(\sigma \right)$ bond is formed when two s-orbitals overlap.
II.A $pi\left(\pi \right)$ bond is formed when two p-orbitals axially overlap.
III.A $\sigma$-bond is weaker than $\pi -$bond.
Which of the above statement is/are correct?

• A. I and II
• B. II and III
• C. I alone
• D. II alone

Answer 1

The correct option is C I alone

A sigma bond is formed when two s-orbitals overlap and is stronger than a pi bond. A pi(π) bond is formed when two p-orbitals overlap sideways. The overlap is not along the internuclear axis. Hence, the region of overlap is small and a pi bond is weaker than a sigma bond.