NEET Chemistry The p-Block Elements (XII) Questions Solved

Give reasons for the following:

(i) Where R is an alkyl group, $R_{3}P=O$ exists but $R_{3}N=O$ does not.

(ii) $PbC{l}_4$ is more covalent than $PbC{l}_2.$

(iii) At room temperature, $N_2$ is much less reactive.