Question

Explain the following facts giving approciate reason in each case :
(i) `NF_(3)` is an exothermic compound whereas `NCl_(3)` is not.
(ii) All the bonds in `SF_(4)` are not equivanent.

Answer 1

(i)It is because `F_(2)` is stronger oxidising agent than `Cl_(2)`, therefore `NF_(3)` is exothermic compound whereas `NCl_(3)` is endothermic.
(ii) In `SF_(4)` bonds are in different planes, therefore,they are not equivalent.