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Coordination Compounds · Question 21

NEET (UG) 2022MCQMedium📈 Topic in 25% papers+4−1
1

The order of energy absorbed which is responsible for the color of complexes (A) [Ni(H2O)2(en)2]2+ (B) [Ni(H2O)4(en)]2+ and (C) [Ni(en)3]2+ is

  1. (A) > (B) > (C)
  2. (C) > (B) > (A)
  3. (C) > (A) > (B)
  4. (B) > (A) > (C)

Answer

(3) (C) > (A) > (B)

Solution

As per NCERT, en is a stronger field ligand than H2O (spectrochemical series: H2O < NH3 < en).

The colour arises from d–d transition, the energy absorbed equals the crystal field splitting o.

The larger the number of en ligands, the larger o and the greater the energy absorbed.

Number of en ligands: (C) [Ni(en)3]2+ = 3, (A) [Ni(H2O)2(en)2]2+ = 2, (B) [Ni(H2O)4(en)]2+ = 1

Energy absorbed: (C) > (A) > (B)

Answer: (3)

NEET (UG) 2022

Keep practising — Coordination Compounds

2

Match List-I with List-II : Choose the correct answer from the options given below :

  1. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
  2. (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
  3. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
  4. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
NEET (UG) 2022 (Phase 2)
3

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). In the light of the above statements, choose the most appropriate answer from the options given below.

  1. (A) is not correct but (R) is correct
  2. Both (A) and (R) are correct and (R) is the correct explanation of (A)
  3. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
  4. (A) is correct but (R) is not correct
NEET (UG) 2022 (Phase 2)
4

Ethylene diaminetetraacetate (EDTA) ion is :

  1. Tridentate ligand with three "N" donor atoms
  2. Hexadentate ligand with four "O" and two "N" donor atoms
  3. Unidentate ligand
  4. Bidentate ligand with two "N" donor atoms
NEET (UG) 2021
5

Match List-I with List-II : Choose the correct answer from the options given below.

  1. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
  2. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
  3. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
  4. (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
NEET (UG) 2021
6

Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?

  1. SCN- < F- < CN- < C2O42-
  2. F- < SCN- < C2O42- < CN-
  3. CN- < C2O42- < SCN- < F-
  4. SCN- < F- < C2O42- < CN-
NEET (UG) 2020
7

What is the correct electronic configuration of the central atom in K4[Fe(CN)6] based on crystal field theory?

  1. t2g4 eg2
  2. t2g6 eg0
  3. e3 t23
  4. e4 t22
NEET (UG) 2019
8

Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code :

  1. (a)-(iv), (b)-(v), (c)-(ii), (d)-(i)
  2. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
  3. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
  4. (a)-(iii), (b)-(v), (c)-(i), (d)-(ii)
NEET 2018
9

The type of isomerism shown by the complex [CoCl2(en)2] is

  1. geometrical isomerism
  2. coordination isomerism
  3. ionization isomerism
  4. linkage isomerism
NEET 2018
10

The geometry and magnetic behaviour of the complex [Ni(CO)4] are

  1. square planar geometry and diamagnetic
  2. tetrahedral geometry and diamagnetic
  3. square planar geometry and paramagnetic
  4. tetrahedral geometry and paramagnetic
NEET 2018
11

Iron carbonyl, Fe(CO)5 is

  1. tetranuclear
  2. mononuclear
  3. trinuclear
  4. dinuclear
NEET 2018

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