Question

Match the following complexes (P) with the geometry (Q)

	P		Q
a	[Cu(NH3)4]2+	i	Tetrahedral
b	[Ag(NH3)2]+	ii	Octahedral
c	Fe(CO)5	iii	Square planar
d	[Cr(H2O)6]3+	iv	Triagonal bipyramidal
e	[NiCl4]2-	v	Linear

• A. a)-(ii);b)-(iii);c)-(i);d)-(iv);e)-(v)
• B. a)-(iii);b)-(v);c)-(iv);d)-(ii);e)-(i)
• C. a)-(iv);b)-(iii);c)-(v);d)-(i);e)-(ii)
• D. a)-(v);b)-(iv);c)-(ii);d)-(iii);e)-(i)
• E. a)-(iv);b)-(ii);c)-(iii);d)-(v);e)-(i)

Answer 1

The Correct Option is B

Complex Geometry Matching:

a) [Cu(NH₃)₄]²⁺:

• Cu²⁺ typically forms square planar complexes
• Matches with (iii) Square planar

 

b) [Ag(NH₃)₂]⁺:

• Linear geometry (coordination number 2)
• Matches with (v) Linear

 

c) Fe(CO)₅:

• Trigonal bipyramidal geometry
• Matches with (iv) Trigonal bipyramidal

 

d) [Cr(H₂O)₆]³⁺:

• Octahedral geometry (coordination number 6)
• Matches with (ii) Octahedral

 

e) [NiCl₄]^2-:

• Tetrahedral geometry (with weak field Cl^- ligands)
• Matches with (i) Tetrahedral

 

Correct Matching: a-(iii), b-(v), c-(iv), d-(ii), e-(i)

Thus, the correct option is (B): a) - (iii); b) - (v); c) - (iv); d) - (ii); e) - (i).

Answer 2

1. Analyze the geometry of each complex:

• a) [Cu(NH₃)₄]²⁺:
  • Copper(II) in this complex has a \( d^9 \) electron configuration, which typically results in a square planar geometry due to the Jahn-Teller effect.
  • Geometry: Square planar (iii).
• b) [Ag(NH₃)₂]⁺:
  • Silver(I) forms a linear complex with two ammonia ligands due to its \( d^{10} \) electron configuration and preference for minimal steric hindrance.
  • Geometry: Linear (v).
• c) Fe(CO)₅:
  • Iron in this complex is in the zero oxidation state and forms five bonds with carbon monoxide ligands. The geometry is trigonal bipyramidal due to the arrangement of the ligands around the central metal atom.
  • Geometry: Trigonal bipyramidal (iv).
• d) [Cr(H₂O)₆]³⁺:
  • Chromium(III) in this complex has six water ligands arranged in an octahedral geometry. This is the most common geometry for complexes with six ligands.
  • Geometry: Octahedral (ii).
• e) [NiCl₄]^2-:
  • Nickel(II) in this complex has four chloride ligands. Due to the weak-field nature of chloride ligands, the complex adopts a tetrahedral geometry rather than square planar.
  • Geometry: Tetrahedral (i).

2. Match the complexes with their geometries:

• a - (iii): Square planar
• b - (v): Linear
• c - (iv): Trigonal bipyramidal
• d - (ii): Octahedral
• e - (i): Tetrahedral

3. Identify the correct option:

• The matching corresponds to Option (B).

4. Final answer:

The correct option is (B).