• # question_answer Sodium thiosulphate is prepared by [IIT 1996] A) Reducing $N{{a}_{2}}S{{O}_{4}}$ solution with ${{H}_{2}}S$ B) Boiling $N{{a}_{2}}S{{O}_{3}}$ solution with $S$ in alkaline medium C) Neutralising ${{H}_{2}}{{S}_{2}}{{O}_{3}}$ solution with $NaOH$ D) Boiling $N{{a}_{2}}S{{O}_{3}}$ solution with $S$ in acidic medium

$N{{a}_{2}}S{{O}_{3}}+S\xrightarrow{NaOH}\underset{\text{Sod}\text{. thiosulphate}}{\mathop{N{{a}_{2}}{{S}_{2}}{{O}_{3}}}}\,$