Question

Which statement is NOT correct ?
(a) A sigma bond is weaker than a p -bond.
(b) A sigma bond is stronger than a p -bond.
(c) A double bond is stronger than a single bond.
(d) A double bond is shorter than a single bond.

Answer 1

(A) A sigma bond is stronger than a pi bond and not weaker that it,
This is because, the s or p Orbitals which are closer to the nucleus make bonds here.
However,a pi bond is strictly made by P or d Orbitals and also not in the axis of nuclei, it takes up lateral overlapping resulting in lesser electrostatic force of attraction that makes up the bond.

Answer 2

Answer:

here it is

Explanation:

N−N single bond is weaker than P−P bond due to smaller size of N as compared to P. Smaller size of N leads to smaller N−N bond length. As a result, the lone pair of electrons on the both the N atoms repel each other leading to unstability or weakening of N−N bond.