IIT-JEE-Chemistry-Paper 2-2007

Paper II

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20. Match the reactions in Column I with nature of the reactions/type of the products in Column II.

Column I		Column II
(A)	O₂^- → O₂ + O₂^2-	(p)	redox reaction.
(B)	CrO₄^2- + H⁺ →	(q)	one of the products has trigonal planar structure
(C)	MnO₄^- + NO₂^- + H⁺ →	(r)	dimeric bridged tetrahedral metal ion
(D)	NO₃^- + H₂SO₄ + Fe²⁺ →	(s)	disproportionation

21. Match the compounds/ions in Column I with their properties/reactions in Column II.

Column I		Column II
(A)	C₆H₆CHO	(p)	Gives precipitate with 2, 4-dinitrophenylhydrazine
(B)	CH₃C≡CH	(q)	Gives precipitate with AgNO₃
(C)	CN^-	(r)	Is a nucleophile
(D)	I^-	(s)	Is involved in cyanohydrins formation

22. Match the crystal system/unit cells mentioned in Column I with their characteristic features mentioned in Column II.

Column I		Column II
(A)	Simple cubic and face-centred cubic	(p)	Have these cell parameters a = b = c and a = b = g
(B)	Cubic and rhombohedral	(q)	Are two crystal systems
(C)	Cubic and tetragonal	(r)	Have only two crystallographic angles of 90^o
(D)	Hexagonal and monoclinic	(s)	Belong to same crystal system