pBlock ElementsII - Result Question 146
####34. Sodium thiosulphate is prepared by
(a) reducing $Na _2 SO _4$ solution with $H _2 S$
(b) boiling $Na _2 SO _3$ solution with $S$ in alkaline medium
(c) neutralising $H _2 S _2 O _3$ solution with $NaOH$
(d) boiling $Na _2 SO _3$ solution with $S$ in acidic medium
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Solution:
- $Na _2 SO _3+S \xrightarrow[\Delta]{OH^{-}} Na _2 S _2 O _3$
