JEE Main & Advanced Chemistry The s-Block Elements Question Bank Alkali Metals

  • 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

    Correct Answer: B

    Solution :

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


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