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Coordination Compounds · Question 91

AIPMT 2002MCQEasy📈 Topic in 25% papers+4−1
1

The hypothetical complex chloro diaquatriammine cobalt(III) chloride can be represented as

  1. [CoCl(NH3)3(H2O)2]Cl2
  2. [Co(NH3)3(H2O)Cl3]
  3. [Co(NH2)3(H2O)2Cl]
  4. [Co(NH3)3(H2O)3]Cl3

Answer

(1) [CoCl(NH3)3(H2O)2]Cl2

Solution

Ligands in the coordination sphere: chloro (Cl-) × 1, aqua (H2O) × 2, ammine (NH3) × 3 coordination number 6

Charge on the complex ion = +3 + (−1) + 0 + 0 = +2 [CoCl(NH3)3(H2O)2]2+

Two chloride ions are needed outside the sphere: [CoCl(NH3)3(H2O)2]Cl2

(As per NCERT, the present IUPAC name of this compound is triamminediaquachloridocobalt(III) chloride.)

Answer: (1)

AIPMT 2002

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2

In the silver plating of copper, K[Ag(CN)2] is used instead of AgNO3. The reason is

  1. a thin layer of Ag is formed on Cu
  2. more voltage is required
  3. Ag+ ions are completely removed from solution
  4. less availability of Ag+ ions, as Cu cannot displace Ag from [Ag(CN)2]- ion.
AIPMT 2002
3

CuSO4 when reacts with KCN forms CuCN, which is insoluble in water. It is soluble in excess of KCN, due to formation of the following complex

  1. K2[Cu(CN)4]
  2. K3[Cu(CN)4]
  3. CuCN2
  4. Cu[KCu(CN)4]
AIPMT 2002
4

Which of the following will give maximum number of isomers?

  1. [Co(NH3)4Cl2]
  2. [Ni(en)(NH3)4]2+
  3. [Ni(C2O4)(en)2]
  4. [Cr(SCN)2(NH3)4]+
AIPMT 2001
5

Coordination number of Ni in [Ni(C2O4)3]4- is

  1. 3
  2. 6
  3. 4
  4. 2
AIPMT 2001
6

Which of the following organometallic compounds is and bonded?

  1. [Fe( 5-C5H5)2]
  2. K[PtCl3( 2-C2H4)]
  3. [Co(CO)5NH3]2+
  4. Fe(CH3)3
AIPMT 2001
7

Which statement is incorrect?

  1. Ni(CO)4 – tetrahedral, paramagnetic
  2. [Ni(CN)4]2- – square planar, diamagnetic
  3. Ni(CO)4 – tetrahedral, diamagnetic
  4. [NiCl4]2- – tetrahedral, paramagnetic.
AIPMT 2001
8

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]
AIPMT 2001
9

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
AIPMT 2000
10

Shape of Fe(CO)5 is

  1. octahedral
  2. square planar
  3. trigonal bipyramidal
  4. square pyramidal
AIPMT 2000
11

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
AIPMT 2000

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