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Coordination Compounds · Question 34

NEET 2017MCQMedium📈 Topic in 25% papers+4−1
1

Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co3+ is

  1. [Co(H2O)6]3+, [Co(en)3]3+, [Co(NH3)6]3+
  2. [Co(H2O)6]3+, [Co(NH3)6]3+, [Co(en)3]3+
  3. [Co(NH3)6]3+, [Co(en)3]3+, [Co(H2O)6]3+
  4. [Co(en)3]3+, [Co(NH3)6]3+, [Co(H2O)6]3+

Answer

(4) [Co(en)3]3+, [Co(NH3)6]3+, [Co(H2O)6]3+

Solution

Spectrochemical series: H2O < NH3 < en (field strength)

⇒ o: [Co(H2O)6]3+ < [Co(NH3)6]3+ < [Co(en)3]3+

∵ o = hc ⇒ larger o means shorter wavelength absorbed.

∴ Increasing order of wavelength: [Co(en)3]3+ < [Co(NH3)6]3+ < [Co(H2O)6]3+

Answer: (4)

NEET 2017

Keep practising — Coordination Compounds

2

Pick out the correct statement with respect to [Mn(CN)6]3-.

  1. It is sp3d2 hybridised and tetrahedral.
  2. It is d2sp3 hybridised and octahedral.
  3. It is dsp2 hybridised and square planar.
  4. It is sp3d2 hybridised and octahedral.
NEET 2017
3

Which of the following has longest C-O bond length? (Free C-O bond length in CO is 1.128 Å.)

  1. [Fe(CO)4]2-
  2. [Mn(CO)6]+
  3. Ni(CO)4
  4. [Co(CO)4]-
NEET 2016 (Phase 1)
4

The correct increasing order of trans-effect of the following species is

  1. NH3 > CN- > Br- > C6H5-
  2. CN- > C6H5- > Br- > NH3
  3. Br- > CN- > NH3 > C6H5-
  4. CN- > Br- > C6H5- > NH3
NEET 2016 (Phase 2)
5

Jahn-Teller effect is not observed in high spin complexes of

  1. d7
  2. d8
  3. d4
  4. d9
NEET 2016 (Phase 2)
6

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

  1. sp3
  2. d2sp2
  3. d2sp3
  4. dsp2
AIPMT 2015
7

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
8

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
9

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
10

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)
11

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)

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