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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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IIT-JEE-Chemistry-Paper 2-2007 Paper II...