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Coordination Compounds · Question 32

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

An example of a sigma bonded organometallic compound is

  1. Grignard's reagent
  2. ferrocene
  3. cobaltocene
  4. ruthenocene.

Answer

(1) Grignard's reagent

Solution

In Grignard's reagent (R-Mg-X) the alkyl carbon is joined to magnesium by a simple σ bond ⇒ σ-bonded organometallic compound.

Ferrocene [Fe( 5-C5H5)2], cobaltocene and ruthenocene are sandwich compounds in which the metal is bonded to the π electrons of the cyclopentadienyl rings ⇒ π-bonded organometallic compounds.

Answer: (1)

NEET 2017

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2

The correct order of the stoichiometries of AgCl formed when AgNO3 in excess is treated with the complexes : CoCl3 6NH3, CoCl3 5NH3, CoCl3 4NH3 respectively is

  1. 3AgCl, 1AgCl, 2AgCl
  2. 3AgCl, 2AgCl, 1AgCl
  3. 2AgCl, 3AgCl, 2AgCl
  4. 1AgCl, 3AgCl, 2AgCl
NEET 2017
3

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+
NEET 2017
4

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
5

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)
6

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)
7

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

  1. d7
  2. d8
  3. d4
  4. d9
NEET 2016 (Phase 2)
8

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

  1. sp3
  2. d2sp2
  3. d2sp3
  4. dsp2
AIPMT 2015
9

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
10

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
11

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

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