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1. Consider a titration of potassium dichromate solution with acidified Mohr's salt solution using diphenylamine as indicator. The number of moles of Mohr's salt required per mole of dichromate is
(A) 3
(B) 4
(C) 5
(D) 6
2. Among the following metal carbonyls, the C-O bond order is lowest in
(A) [Mn(CO)6]+
(B) [Fe(CO)5]
(C) [Cr(CO)6]
(D) [V(CO)6]-
3. A solution of a metal ion when treated with KI gives a red precipitate which dissolves in excess KI to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is
(A) Pb2+
(B) Hg2+
(C) Cu2+
(D) Co2+
4. Cyclohexene and ozonlysis followed by reaction with zinc dust and water gives compound E. Compound E on further treatment with aqueous KOH yields compound F. Compound F is
5. The number of stereoisomers obtained by bromination of trans-2-butene is
(A) 1
(B) 2
(C) 3
(D) 4
6. Among the following, the least stale resonance structure is
7. A positron is emitted from 23Na11. The ratio of the atomic mass and atomic number of the resulting nuclide is
(A) 22/10
(B) 22/11
(C) 23/10
(D) 23/12
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IIT-JEE-Chemistry-Paper 2-2007 Paper II...