P-Block Elements Ques 86

Question: When thiosulphate ion is oxidised by iodine, which one of the following ion is produced

[CPMT 1989; AFMC 1990; CBSE PMT 1996]

Options:

A) $ SO_3^{2-} $

B) $ SO_4^{2-} $

C) $ S_4O_6^{2-} $ (Tetrathionate)

D) $ S_2O_6^{2-} $

Show Answer

Answer:

Correct Answer: C

Solution:

$ 2Na_2S_2O_3+I_2\to 2NaI+Na_2S_4O_6 $



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