Coordination Compounds · JEE Main previous year questions

2004 3 questions

1. Q1932004 · 24 Apr 2004 · Shift 1

   The coordination number of central metal atom in a complex is determined by :

   1. A.the number of ligands around a metal ion bonded by sigma bonds
   2. B.the number of only anionic ligands bonded to the metal ion
   3. C.the number of ligands around a metal ion bonded by sigma and pi- bonds both
   4. D.the number of ligands around a metal ion bonded by pi-bonds
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   Answer: A

2. Q1952004 · 24 Apr 2004 · Shift 1

   Coordination compound have great importance in biological systems. In this context which of the following statements is incorrect?

   1. A.Chlorophylls are green pigments in plants and contains calcium
   2. B.Carboxypeptidase – A is an enzyme and contains zinc
   3. C.Cyanocobalamin is ${\mathrm{B}}_{12}$ and contains cobalt
   4. D.Haemoglobin is the red pigment of blood and contains iron
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   Answer: A

3. Q1982004 · 24 Apr 2004 · Shift 1

   Among the properties (a) reducing (b) oxidising (c) complexing, the set of properties shown by $\mathrm{C}{\mathrm{N}}^{-}$ ion towards metal species is :

   1. A.c, a
   2. B.b, c
   3. C.a, b
   4. D.a, b, c
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   Answer: A