Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Which of the following halides cannot be hydrolyzed ?
(I)TeF 6 (II)SF 6 (III)NC1 3 (IV)NF 3
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Text Solution
Verified by ExpertsThe correct answer is:
D
II and IV
In SF 6 , S sterically hindered by six fluorine atoms hence, attack of H 2 O molecule will not occur. NF 3 is not hydrolysed due to absence of vacant orbital either on N of F atom.
TeF 6 is hydrolysed due to large size of Te.
NC1 3 + 4H 2 O 
NH 4 OH + 3HOC1
TeF 6 + 6H 2 O 
6HF + H 6 TeO 6
(Telluric acid)
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