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Coordination Compounds · Question 39

AIPMT 2015MCQEasy📈 Topic in 38% papers+4−1
1

The hybridization involved in complex [Ni(CN)4]2- is (At. No. Ni = 28)

  1. sp3
  2. d2sp2
  3. d2sp3
  4. dsp2

Answer

(4) dsp2

Solution

Oxidation state of Ni: x + 4(-1) = -2 ⇒ x = +2

Ni2+ (Z = 28): [Ar] 3d8

∵ CN- is a strong field ligand, the two unpaired 3d electrons pair up and one 3d orbital becomes empty.

⇒ One 3d, one 4s and two 4p orbitals hybridise: dsp2 (square planar, diamagnetic).

As per NCERT, [Ni(CN)4]2- is square planar with dsp2 hybridisation.

Answer: (4)

AIPMT 2015

Keep practising — Coordination Compounds

2

The name of complex ion, [Fe(CN)6]3- is

  1. hexacyanitoferrate (III) ion
  2. tricyanoferrate (III) ion
  3. hexacyanidoferrate (III) ion
  4. hexacyanoiron (III) ion.
AIPMT 2015
3

The sum of coordination number and oxidation number of the metal M in the complex [M(en)2(C2O4)]Cl (where en is ethylenediamine) is

  1. 6
  2. 7
  3. 8
  4. 9
AIPMT 2015
4

Number of possible isomers for the complex [Co(en)2Cl2]Cl will be (en = ethylenediamine)

  1. 1
  2. 3
  3. 4
  4. 2
AIPMT 2015
5

Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at 25 ?

  1. CoCl3 5NH3
  2. CoCl3 6NH3
  3. CoCl3 3NH3
  4. CoCl3 4NH3
AIPMT 2015 (Cancelled)
6

Which of these statements about [Co(CN)6]3- is true?

  1. [Co(CN)6]3- has four unpaired electrons and will be in a high-spin configuration.
  2. [Co(CN)6]3- has no unpaired electrons and will be in a high-spin configuration.
  3. [Co(CN)6]3- has no unpaired electrons and will be in a low-spin configuration.
  4. [Co(CN)6]3- has four unpaired electrons and will be in a low-spin configuration.
AIPMT 2015 (Cancelled)
7

Among the following complexes the one which shows zero crystal field stabilization energy (CFSE) is

  1. [Mn(H2O)6]3+
  2. [Fe(H2O)6]3+
  3. [Co(H2O)6]2+
  4. [Co(H2O)6]3+
AIPMT 2014
8

Which of the following complexes is used as an anticancer agent?

  1. mer-[Co(NH3)3Cl3]
  2. cis-[PtCl2(NH3)2]
  3. cis-K2[PtCl2Br2]
  4. Na2CoCl4
AIPMT 2014
9

A magnetic moment of 1.73 BM will be shown by one among the following

  1. TiCl4
  2. [CoCl6]4-
  3. [Cu(NH3)4]2+
  4. [Ni(CN)4]2-
NEET 2013
10

An excess of AgNO3 is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium(III) chloride. The number of moles of AgCl precipitated would be

  1. 0.003
  2. 0.01
  3. 0.001
  4. 0.002
NEET 2013
11

Crystal field splitting energy for high spin d4 octahedral complex is

  1. -1.2 o
  2. -0.6 o
  3. -0.8 o
  4. -1.6 o
NEET 2013 (Karnataka)

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