Ncert Exercises & Solutions

Which of the following statements is wrong?

1.	Single N—N bond is stronger than a single P—P bond.
2.	${PH}_{3}$ can act as a ligand in the formation of coordination compound with transition elements.
3.	${NO}_{2}$ is paramagnetic in nature.
4.	Covalency of nitrogen in $N_{2} O_{5}$ is four.