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Coordination Compounds

AIPMT 2001MCQEasy📈 Topic in 25% papers+4−1
Ques. 1AIPMT 2001

Which of the following will exhibit maximum ionic conductivity?

  1. K4[Fe(CN)6]
  2. [Co(NH3)6]Cl3
  3. [Cu(NH3)4]Cl2
  4. [Ni(CO)4]

Answer

(1) K4[Fe(CN)6]

Solution

Ionic conductivity increases with the number of ions given in solution.

K4[Fe(CN)6] 4K+ + [Fe(CN)6]4- 5 ions

[Co(NH3)6]Cl3 [Co(NH3)6]3+ + 3Cl- 4 ions

[Cu(NH3)4]Cl2 [Cu(NH3)4]2+ + 2Cl- 3 ions

[Ni(CO)4] is neutral no ions

K4[Fe(CN)6] shows the maximum ionic conductivity.

Answer: (1)

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Ques. 2AIPMT 2000

In qualitative analysis of second group in laboratory, H2S gas is passed in acidic medium for precipitation. When Cu2+ and Cd2+ react with KCN, then for product, true statement is

  1. K2[Cu(CN)4] – more stable; K2[Cd(CN)4] – less stable
  2. K2[Cu(CN)4] – less stable; K2[Cd(CN)4] – more stable
  3. K3[Cu(CN)4] – more stable; K2[Cd(CN)4] – less stable
  4. K3[Cu(CN)4] – less stable; K3[Cd(CN)4] – more stable
Ques. 3AIPMT 2000

Shape of Fe(CO)5 is

  1. octahedral
  2. square planar
  3. trigonal bipyramidal
  4. square pyramidal
Ques. 4AIPMT 2000

Which complex compound will give four isomers?

  1. [Fe(en)3]Cl3
  2. [Co(en)(NH3)2Cl2]Cl
  3. [Fe(PPh3)3NH3ClBr]Cl
  4. [Co(PPh3)3Cl]Cl3

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