PYQSide ExamsMy practice

Coordination Compounds · Question 6

JEE Main 2026 (Online) 5th April Morning ShiftMCQEasy📈 Topic in 3% papers+4−1
1

The correct statements about metal carbonyls are Choose the correct answer from the options given below :

  1. A and B Only
  2. A, C and D Only
  3. B and C Only
  4. A and D Only

Answer

(2) A, C and D Only

Solution

As per NCERT, the metal–carbon bond in metal carbonyls possesses both σ and π character:

• σ bond: lone pair on the carbonyl carbon is donated into a vacant orbital of the metal – C is correct.

• π bond: electrons from a filled metal d orbital are donated into the vacant antibonding π* orbital of CO – D is correct.

These two effects reinforce each other (synergic bonding), which STRENGTHENS the M–C bond – so B is incorrect; A is correct.

∴ Correct statements: A, C and D

Answer: (2)

JEE Main 2026 (Online) 5th April Morning Shift

Keep practising — Coordination Compounds

2

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below

  1. Both Statement I and Statement II are correct
  2. Both Statement I and Statement II are incorrect
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct
JEE Main 2026 (Online) 5th April Morning Shift
3

Identify the correct statements from the following Choose the correct answer from the options given below :

  1. A, B, C, D and E
  2. B, C and D only
  3. A, C and D only
  4. A, C and E only
JEE Main 2026 (Online) 5th April Evening Shift
4

The total number of unpaired electrons present in the d3, d4 (low spin) d5 (high spin), d6 (high spin) and d7 (low spin) octahedral complex systems is .

JEE Main 2026 (Online) 5th April Evening Shift
5

Consider the metal complexes [Ni(en)3]2+ (A), [NiCl4]2- (B) and [Ni(NH3)6]2+ (C). Choose the CORRECT option by considering the number of unpaired electrons present in (A), (B) and (C) respectively and the order of frequency of absorption.

  1. 2, 2, 2 and (A) > (C) > (B)
  2. 0, 2, 0 and (A) > (C) > (B)
  3. 2, 2, 0 and (B) > (C) > (A)
  4. 2, 2, 2 and (C) > (A) > (B)
JEE Main 2026 (Online) 4th April Evening Shift
6

Match List - I with List - II.

  1. A-I, B-II, C-III, D-IV
  2. A-II, B-III, C-IV, D-I
  3. A-III, B-IV, C-I, D-II
  4. A-IV, B-I, C-II, D-III
JEE Main 2026 (Online) 2nd April Morning Shift
7

5.33 g of CrCl3 6H2O, which is a 1 : 3 electrolyte, is dissolved in water and is passed through a cation exchanger. The chloride ions in the eluted solution, on treatment with AgNO3 results in 8.61 g of AgCl. The ratio of moles of complex reacted and moles of AgCl formed is 10-2. (Nearest integer) [Molar mass in g mol-1 Cr : 52, Ag : 108, Cl : 35.5, H : 1, O : 16]

JEE Main 2026 (Online) 2nd April Morning Shift
8

Which of the following complexes will show coordination isomerism? Choose the correct answer from the options given below:

  1. B, C and D Only
  2. B, D and E Only
  3. A, C and D Only
  4. C, D and E Only
JEE Main 2026 (Online) 2nd April Evening Shift
9

The correct statement among the following is:

  1. [Ni(CN)4]2- and [NiCl4]2- are diamagnetic and Ni(CO)4 is paramagnetic.
  2. Ni(CO)4 is diamagnetic and [NiCl4]2- and [Ni(CN)4]2- are paramagnetic.
  3. Ni(CO)4 and [NiCl4]2- are diamagnetic and [Ni(CN)4]2- is paramagnetic.
  4. Ni(CO)4 and [Ni(CN)4]2- are diamagnetic and [NiCl4]2- is paramagnetic.
JEE Main 2026 (Online) 28th January Morning Shift
10

X is the number of geometrical isomers exhibited by [Pt(NH3)(H2O)BrCl]. Y is the number of optically inactive isomer(s) exhibited by [CrCl2(ox)2]3-. Z is the number of geometrical isomers exhibited by [Co(NH3)3(NO2)3]. The value of X + Y + Z is .

JEE Main 2026 (Online) 28th January Morning Shift
11

The correct increasing order of spin-only magnetic moment values of the complex ions [MnBr4]2- (A), [Cu(H2O)6]2+ (B), [Ni(CN)4]2- (C) and [Ni(H2O)6]2+ (D) is :

  1. A = B < D < C
  2. C = D < B < A
  3. C < B < D < A
  4. A = B < C < D
JEE Main 2026 (Online) 28th January Evening Shift

All Coordination Compounds PYQs →

PDFDownload Coordination Compounds PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All JEE Main Chemistry chapters