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Chapter 9: Coordination Compounds

NCERT Solutions for CBSE Class 10 Chemistry — 17 solved questions with detailed explanations.

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Solved Questions

Q1. The coordination number of Pt in [PtCl₆]²⁻ is:

2
4
6
8

Difficulty: Easy · Topic: Coordination Number

Solution

[PtCl₆]²⁻: Pt is bonded to 6 Cl ligands. Coordination number = 6.

Q2. The IUPAC name of [Co(NH₃)₆]Cl₃ is:

Hexaamminecobalt(III) chloride
Cobalt hexaammine chloride
Trichlorohexaamminecobalt
Hexaamminecobalt(II) chloride

Difficulty: Easy-Medium · Topic: Nomenclature

Solution

[Co(NH₃)₆]³⁺: Hexaamminecobalt(III). Counter ion: chloride. Full name: Hexaamminecobalt(III) chloride.

Q3. A chelate ligand has:

no donor atoms
one donor atom
two or more donor atoms
metallic bonds

Difficulty: Easy-Medium · Topic: Coordination Compounds

Solution

two or more donor atoms.

Q4. EDTA is a:

bidentate ligand
hexadentate ligand
tridentate ligand
monodentate ligand

Difficulty: Easy-Medium · Topic: Coordination Compounds

Solution

hexadentate ligand.

Q5. Isomers with same formula but different ligand arrangement are:

ionization isomers
linkage isomers
optical isomers
geometrical isomers

Difficulty: Easy-Medium · Topic: Coordination Compounds

Solution

geometrical isomers.

Q6. Werner's theory proposed:

no valency
primary and secondary valency
only primary valency
covalent bonding only

Difficulty: Easy-Medium · Topic: Coordination Compounds

Solution

primary and secondary valency.

Q7. Diamagnetic complexes have:

no unpaired electrons
all unpaired electrons
one unpaired electron
cannot be determined

Difficulty: Easy-Medium · Topic: Coordination Compounds

Solution

no unpaired electrons.

Q8. Coordination number of metal in [Ni(NH₃)₆]²⁺:

7
8
6
4

Difficulty: Easy-Medium · Topic: CN

Solution

CN = number of donor atoms = 6.

Q9. Coordination number of metal in [CuCl₄]²⁻:

2
6
4
5

Difficulty: Easy-Medium · Topic: CN

Solution

CN = number of donor atoms = 4.

Q10. Coordination number of metal in [Ag(NH₃)₂]⁺:

2
6
3
4

Difficulty: Easy-Medium · Topic: CN

Solution

CN = number of donor atoms = 2.

Q11. Coordination number of metal in [Fe(CN)₆]³⁻:

4
8
6
7

Difficulty: Easy-Medium · Topic: CN

Solution

CN = number of donor atoms = 6.

Q12. Coordination number of metal in [Co(en)₃]³⁺:

8
4
7
6

Difficulty: Easy-Medium · Topic: CN

Solution

CN = number of donor atoms = 6.

Q13. Coordination number of metal in [PtCl₄]²⁻:

5
6
4
2

Difficulty: Easy-Medium · Topic: CN

Solution

CN = number of donor atoms = 4.

Q14. Coordination number of metal in [Cr(H₂O)₆]³⁺:

7
8
6
4

Difficulty: Easy-Medium · Topic: CN

Solution

CN = number of donor atoms = 6.

Q15. Coordination number of metal in [Zn(OH)₄]²⁻:

2
6
5
4

Difficulty: Easy-Medium · Topic: CN

Solution

CN = number of donor atoms = 4.

Q16. Coordination number of metal in [FeCl₄]⁻:

2
5
4
6

Difficulty: Easy-Medium · Topic: CN

Solution

CN = number of donor atoms = 4.

Q17. Crystal field splitting energy (Δ₀) increases in the order:

Cl⁻ < H₂O < NH₃ < CN⁻
CN⁻ < NH₃ < H₂O < Cl⁻
H₂O < Cl⁻ < NH₃ < CN⁻
NH₃ < CN⁻ < H₂O < Cl⁻

Difficulty: Medium · Topic: CFT

Solution

Spectrochemical series (partial): I⁻ < Br⁻ < Cl⁻ < F⁻ < H₂O < NH₃ < en < CN⁻ < CO.

Other Chapters in Chemistry

Ch 1: Solid State Ch 2: Solutions Ch 3: Electrochemistry Ch 4: Chemical Kinetics Ch 5: Surface Chemistry Ch 6: Isolation of Elements Ch 7: p-Block Elements Ch 8: d & f Block Elements Ch 10: Haloalkanes & Haloarenes Ch 11: Alcohols Phenols Ethers Ch 12: Aldehydes Ketones Ch 13: Amines Ch 14: Biomolecules Ch 15: Polymers Ch 16: Chemistry in Everyday Life

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