Alkyl Halides and Aryl HalidesHard

Question

Which of the following halides cannot be hydrolysed :-
(I) TeF6 (II) SF6 (III) NCl3 (IV) NF3
Choose the correct code :

Options

A.III and IV
B.I, II and III
C.I, II and IV
D.II and IV

Solution

In SF6, S sterically hindered by six fluorine atoms hence, attack of H2O molecule will not occur. NF3 is not hydrolysed due to absence of vacant orbital either on N of F atom.
TeF6 is hydrolysed due to large size of Te.

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