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:

  1. $Na _2 SO _3+S \xrightarrow[\Delta]{OH^{-}} Na _2 S _2 O _3$


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