Question

A solution of sodium thiosulphate on addition of few drops
of ferric chloride gives violet colour due to the formation of
(a) Na₂S₄O₆ (b) Fe₂(SO₄)₃
(c) Fe₂(ScO₃)₃ (d) Fe₂(S₂O₃)₂

Answer 1

Dear Student,

◆ Answer -

(c) Fe₂(S₂O₃)₃

● Explanation -

When few drops

of ferric chloride are added to a solution of sodium thiosulphate, ferric thiosulphate is formed which gives it violet colour.

3 Na₂S₂O₃ + 2 FeCl₃ --> Fe₂(S₂O₃)₃ + 6 NaCl

Hence, the violet colour is due to the formation of Fe₂(S₂O₃)₃.

Thanks dear. Hope this helps you..

Answer 2

(c) Fe₂(ScO₃)₃

hope this will help you buddy