JEE Advanced Chemistry question

The term 'thio' is used in the names of all of the following compounds except

(A)Na2S2O3
(B)NaCS3
(C)NaSCN
(D)Na2SO3Correct

Answer: (D)

Solution

The prefix "thio" denotes the replacement of an oxygen atom by a sulphur atom in a parent oxo-compound: Na2S2O3 (thiosulphate = sulphate with one O replaced by S), NaCS3 (trithiocarbonate, all three O of carbonate replaced by S), and

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Question ID VK-159310