IIT-JEE-Chemistry-Paper 2-2007

Paper II

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14.    Among the following, identify the correct statement.

        (A)    Chloride ion is oxidized by O₂

        (B)    Fe²⁺ is oxidized by iodine

        (C)    Iodide ion is oxidized by chlorine

        (D)    Mn²⁺ is oxidized by chlorine

 

15.    While Fe³⁺ is stable, Mn³⁺ is not stable in acid solution because

        (A)    O₂ oxidises Mn²⁺ to Mn³⁺

        (B)    O₂ oxidises both Mn²⁺ to Mn³⁺ and Fe²⁺ to Fe³⁺

        (C)    Fe³⁺ oxidizes H₂O to O₂

        (D)    Mn³⁺ oxidizes H₂O to O₂

 

16.    Sodium fusion extract, obtained from aniline, on treatment with iron(II) sulphate and H₂SO₄ in presence of air gives a Prussian blue precipitate. The blue colour is due to the formation of

        (A)    Fe₄[Fe(CN)₆]₃

        (B)    Fe₃[Fe(CN)₆]₂

        (C)    Fe₄[Fe(CN)₆]₂

        (D)    Fe₃[Fe(CN)₆]₃

 

17.    Which one of the following reagents is used in the above reaction?

        (A)    aq. NaOH + CH₃CI

        (B)    aq. NaOH + CH₂CI₂

        (C)    aq. NaOH + CHCI₃

        (D)    aq. NaOH + CCI₄

 

18.    The electrophile in this reaction is

        (A)    :CHCI

        (B)    +CHCI₂

        (C)    :CCI₂

        (D)    .CCI₃

 

19.    The structure of the intermediate I is

        

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