Chemical Bonding and Molecular Structure - Result Question 83
####85. Which statement is NOT correct? [1990]
(a) A sigma bond is weaker than a $\pi$-bond.
(b) A sigma bond is stronger than a $\pi$-bond.
(c) A double bond is stronger than a single bond.
(d) A double bond is shorter than a single bond.
Show Answer
Solution:
- (a) A $\sigma$ - bond is stronger than a $\pi$-bond hence option (a) is not correct.
Sigma (s) bonds are formed by head on overlap of unhybridised $s-s, p-p$ or $s-p$ orbitals and hybridised orbitals $(s p, s p^{2}, s p^{3}, s p^{3} d.$ and $s p^{3} d^{2}$ ) hence $s$ bonds are strong bonds where as $Pi(p)$ bonds are formed by side ways overlap of unhybridised $p$ - and $d$-orbitals hence $p$ bonds are weak bonds.
