Statement-1: Single $\mathrm{N}-\mathrm{N}$ bond is weaker than the single $\mathrm{P}-\mathrm{P}$ bond.

Statement-2: In $\mathrm{N}-\mathrm{N}$ bond there is high interelectronic repulsion of the non-bonding electrons, resulting in weaker bond.

Because N is smaller than P, a single N-N bond is weaker than a P-P bond. N bond length decreases as N size decreases. As a result, the lone pair of electrons on both N atoms repel each other, causing the N-N bond to become unstable or weak. Because of the larger size of the P atom, the P-P bond length is longer and the lone pair-lone pair repulsion between P -atoms is lower, making the PP bond stronger than the N-N bond.