(i) Single N–N bond is stronger than the single P–P bond.

(ii) PH3 can act as a ligand in the formation of a coordination compound with transition elements.

(iii) NO2 is paramagnetic.

(iv) Covalency of nitrogen in N2O5 is four

Correct Answer: (i) Single N–N bond is stronger than the single P–P bond

Explanation: Single N–N bond is weaker than the single P–P bond.