Give reasons for the following:
(i) Where R is an alkyl group, exists but does not.
(ii) is more covalent than
(iii) At room temperature, is much less reactive.
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Concept Questions :-
(i) Due to presence of d-orbitals in P, it can form bonds and can extend its covalency beyond 4 while N cannot do so due to absence of d-orbitals.
(ii) According to Fajan's rule, highly charged can polarise the anion i.e., more effectively than and hence becomes more covalent than
(iii) Due to presence of triple bonds between 2N atoms, their bond length decreases and hence bond dissociation energy increases which makes lesser reactive. While in phosphorus due to presence of single bond, more bond length, bond dissociation energy is low, hence very reactive.