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IIT-JEE-Chemistry-Paper 2-2007

Paper II

______________________________________________________________________

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

        chemical-structure

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