JEE Main & Advanced Chemistry The s-Block Elements Question Bank Critical Thinking

  • question_answer The reaction of \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] with iodine gives [CPMT 1971, 80, 81; DPMT 1983, 90; MP PMT 1985; EAMCET 1990; BHU 1980]

    A) Sodium sulphide

    B) Sodium sulphite

    C) Sodium sulphate

    D) Sodium tetrathionate

    Correct Answer: D

    Solution :

    \[2N{{a}_{2}}{{S}_{2}}{{O}_{3}}+{{I}_{2}}\,\to \,N{{a}_{2}}{{S}_{4}}{{O}_{8}}+2NaI\].

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