JEE Main & Advanced Chemistry Halogen Family Question Bank Halogen Family

  • question_answer When thiosulphate ion is oxidised by iodine, which one of the following ion is produced [CPMT 1989; AFMC 1990; CBSE PMT 1996]

    A) \[SO_{3}^{2-}\]

    B) \[SO_{4}^{2-}\]

    C) \[{{S}_{4}}O_{6}^{2-}\] (Tetrathionate)

    D) \[{{S}_{2}}O_{6}^{2-}\]

    Correct Answer: C

    Solution :

      \[2N{{a}_{2}}{{S}_{2}}{{O}_{3}}+{{I}_{2}}\,\to \,2NaI+N{{a}_{2}}{{S}_{4}}{{O}_{6}}\]

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