Class XII Chemistry Coordination Compounds 1

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Question 1

The d-electron configurations of Cr²⁺, Mn²⁺, Fe²⁺, and Co²⁺ are d⁴, d⁵, d⁶, and d⁷ respectively. Which one of the following will exhibit minimum paramagnetic behavior?
(At. No Cr= 24, Mn= 25, Fe=26, Co= 27)

• A[Fe(H₂O)₆]²⁺
• B[Co(H₂O)₆]²⁺
• C[Cr(H₂O)₆]²⁺
• D[Mn(H₂O)₆]²⁺

Question 2

In which of the following coordination entities the magnitude of A.(CFSE in octahedral field) will be maximum?
(Atomic number Co = 27)

• A[Co(H₂O)₆]³⁺
• B[Co(NH3)₆]³⁺
• C[Co(CN)₆]^3-
• D[Co(C₂O₄)₃]^3-

Question 3

Name of the compound given below is:

• A2, 3-diethylheptane
• B5-ethyl-6-methyloctane
• C4-ethyl-3-methyloctane
• D3-methyl-4-ethyloctane

Question 4

Which one of the following will give maximum number of isomers?

• A
• B
• C
• D

Question 5

Considering H₂O as weak field ligand, the number of unpaired electrons in will be (At. No. of Mn=25).

• A3
• B5
• C2
• D4

Question 6

Iron carbonyl, is

• Atetranuclear
• Bmononuclear
• Ctrinuclear
• Ddinuclear

Question 7

Among the following, which is not the -bonded organometallic compound?

• A
• B
• C
• D

Question 8

Which of the following will exhibit maximum ionic conductivity?

• A
• B
• C
• D

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