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12th Chemistry - Coordination Chemistry - One Mark Question and Answer

Published on: 27/08/2019

Coordination Chemistry

Download Tamil Nadu 12th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

Questions + Answers key

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Std: 12th Standard - Chemistry

chapter: - Model Question paper

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Questions:

Multiple Choice Question

10 x 1 = 10

[Fe(H₂O)₆]³⁺and [Fe(CN)₆]^3-differ in _______.

(a)

magnetic nature

(b)

co-ordination number

(c)

oxidation number

(d)

Structure

The spin only magnetic moment of [Mnfsr₄]^2- is 5.9 BM. Geometry of the complex ion is _______.

(a)

Tetrahedral

(b)

Octahedral

(c)

Square planar

(d)

Pentagonal pyramidal

Co-ordination isomerism is exhibited by _______.

(a)

[Cr(en)₂Cl₂]NO₂

(b)

[Pt(NH₃)₄] [CuCl₄]

(c)

[Cr(en)₂Cl₂]NO

(d)

[Co(NH₃)₅Cl]Cl₂

Which of the following octahedral complexes do not show geometrical isomerism?

(a)

[Co(NH₃)₃Cl₃]

(b)

[PtCl₂(NH₃)₄]

(c)

[Pt(NH₃)₂Cl₂]

(d)

[Co(en)₃]³⁺

Structural formula of tetra aqua dichlorido Chromium (III) chloride _______.

(a)

[Cr(H₂O)₄Cl₂]Cl₂

(b)

[Cr(H₂O)₄Cl₃]

(c)

[(H₂O)₄Cl₂Cr]Cl₂

(d)

[Cl₂(H₂O)₄Cr]Cl₃

Primary and secondary valencies of Cu in [Cu(NH₃)₄]SO₄ is _______.

(a)

4,4

(b)

2,4

(c)

4,1

(d)

4,2

The total number of electrons donated by ligands to platinum ion in [Pt(en)₂CI₂] is _______.

(a)

(b)

(c)

(d)

In which of the following coordination entities the magnitude of Δ₀ will be maximum?

(a)

[Co(CN)₆]^3-

(b)

[Co(C₂O₄)₃]^3-

(c)

[Co(H₂O)₆]³⁺

(d)

[Co(NH₃)₆]³⁺

Crystal field stabilization energy for high spin d⁵ octahedral complex is _______.

(a)

-0.6\({ \Delta }_{ 0 }\)

(b)

(c)

2(P-\({ \Delta }_{ 0 }\))

(d)

2(P+\({ \Delta }_{ 0 }\))

10.

A magnetic moment of 1.73BM will be shown by one among the following.

(a)

TiCl₄

(b)

[CoCl₆]^4-

(c)

[Cu(NH₃)₄]²⁺

(d)

[Ni(CN)₄]^2-

Match the following

5 x 1 = 5

11.

Primary valences

12.

Magnu's green salt

13.

Zeisel salt

14.

k - term

15.

Tin

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Answers Key:

Multiple Choice Question

10 x 1 = 10

(a)
magnetic nature

(a)
Tetrahedral

(b)
[Pt(NH₃)₄] [CuCl₄]

(d)
[Co(en)₃]³⁺

(a)
[Cr(H₂O)₄Cl₂]Cl₂

(b)
2,4

In all the complexes, the central metal ion is Co³⁺, among the given ligands CN^- is the strongest ligand, which causes large crystal
field splitting i.e maximum Δ₀

The electronic configuration t_2g³, e²_g
[ 3 x (-0.4)+ 2(0.6)]Δ₀
[-1.2 + 1.2] Δ₀ = 0

10.

Ti⁴⁺ (d⁰ ⇒ 0BM)
Co²⁺ (d⁷ spain free ⇒ t_2g⁵, e²_g;n = 3; μ = 3.9BM)
Cu²⁺ (d⁹ Low spain ⇒ t_2g⁶, e³_g; n = 1; μ = 1.732BM)
Ni²⁺ (d⁸ Low spain ⇒ t_2g⁶, e²_g;n = 2; μ = 2.44 BM)