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Coordination Compounds

JEE Main 2024 (Online) 29th January Morning ShiftMCQEasy📈 Topic in 7% papers+4−1
Ques. 1JEE Main 2024, 29 January (Morning Shift)

In which one of the following metal carbonyls, CO forms a bridge between metal atoms?

  1. [Os3(CO)12]
  2. [Ru3(CO)12]
  3. [Mn2(CO)10]
  4. [Co2(CO)8]

Answer

(4) [Co2(CO)8]

Solution

(A) [Os3(CO)12]: Os3 triangle (Os–Os bonds), all 12 CO terminal ⇒ no bridge

(B) [Ru3(CO)12]: same structure as Os ⇒ all CO terminal

(C) [Mn2(CO)10]: Mn–Mn bond, 5 terminal CO on each Mn ⇒ no bridge

(D) [Co2(CO)8]: Co–Co bond + 2 bridging CO (6 terminal CO):

[figure]

∵ only in [Co2(CO)8] does a CO bond to both metal atoms (μ-CO)

Answer: (4)

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Ques. 2JEE Main 2024, 29 January (Evening Shift)

The correct IUPAC name of K2MnO4 is

  1. Potassium tetraoxidomanganate (VI)
  2. Dipotassium tetraoxidomanganate (VII)
  3. Potassium tetraoxopermanganate (VI)
  4. Potassium tetraoxidomanganese (VI)
Ques. 3JEE Main 2024, 27 January (Morning Shift)

Consider the following complex ions P = [FeF6]3- Q = [V(H2O)6]2+ R = [Fe(H2O)6]2+ The correct order of the complex ions, according to their spin only magnetic moment values (in B.M.) is :

  1. R < Q < P
  2. R < P < Q
  3. Q < R < P
  4. Q < P < R
Ques. 4JEE Main 2024, 27 January (Evening Shift)

Identify from the following species in which d2sp3 hybridization is shown by central atom :

  1. [Co(NH3)6]3+
  2. SF6
  3. [PtCl4]2-
  4. BrF5
Ques. 5JEE Main 2024, 27 January (Evening Shift)

The Spin only magnetic moment value of square planar complex [Pt(NH3)2Cl(NH2CH3)]Cl is B.M. (Nearest integer) (Given atomic number for Pt = 78)

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