MCQ Valence Bond Theory, Class 12 Chemistry

1. There will be total 20 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. When two isomers are mirror images of each other and rotates the plane of polarized light in opposite directions, it is a type of:

Structural isomerism

Linkage isomerism

Optical isomerism

Ionisation isomerism

Your comments:

Question 1 of 20

2. Valence bond theory helps to know about:

Shape of molecule

Magnetic behaviour of molecule

Colour of the compound

None of these

Your comments:

Question 2 of 20

3. Dichlorotetrammine cobalt(III) ion exhibits:

Structural isomerism

Geometrical isomerism

Linkage isomerism

Ionisation isomerism

Your comments:

Question 3 of 20

4. [Pt(NH₃)₄Cl₂]Br₂ and [Pt(NH₃)₄Br₂]Cl₂ is a type of:

Coordinate isomer

Structural isomer

Ionisation isomer

Linkage isomer

Your comments:

Question 4 of 20

5. The oxidation number of Pt in the complex [Pt(C₂H₄)Cl₃]^- is:

+1

+4

+2

+3

Your comments:

Question 5 of 20

6. The d and l isomer of [Co(en)₃]³⁺ are type of:

Geometrical isomerism

Optical isomerism

Linkage isomerism

Ionisation isomerism

Your comments:

Question 6 of 20

7. Compounds which give different ions in solution although they have same composition are called:

Coordinate isomerism

Ionisation isomerism

Structural isomerism

Linkage isomerism

Your comments:

Question 7 of 20

8. The shape of [Co(NH₃)₆]³⁺ according to VBT is:

Octahedral

Tetrahedral

Trigonal bipyramidal

Square planar

Your comments:

Question 8 of 20

9. The electronic configuration of chromium in [Cr(NH₃)₆]³⁺ is:

[Ar]3d₅4s₂

[Ar]3d₅4s₁

[Ar]3d₅4s₄

[Ar]3d₅4s₃

Your comments:

Question 9 of 20

10. Which would exhibit coordination isomerism?

[Co(NH₃)₅Br]2+SO₄ ^2-

[Cr(NH₃)₆]Cl₃

[Pt(NH₃)₄Cl₂]Br₂

[Cr(NH₃)₆] [Co(CN)₆]

Your comments:

Question 10 of 20

11. K₃[CoF₆] is high spin complex. What is the hybrid state of Co atom in this complex?

sp₃d

dsp₂

sp₃d₂

d₂sp₃

Your comments:

Question 11 of 20

12. Phenomenon of existence of two or more substances having the same molecular formulae but different structural or special arrangements is:

Covalency

Ionization

Isomerism

Bonding

Your comments:

Question 12 of 20

13. In the complex [Ni(H₂O)₂(NH₃)₄]²⁺ the no. of unpaired electrons is

2

5

0

1

Your comments:

Question 13 of 20

14. When both positive and negative ions of a salt are complex ions and the two isomers differs in the distribution of ligands in the cation and the anion; it is a type of:

Coordination isomerism

Linkage isomerism

Optical isomerism

Geometrical isomerism

Your comments:

Question 14 of 20

15. According to VBT, the shape of [NiCl₄]^-2 is tetrahedral and the hybridization state of Ni is:

sp₃d₂

sp₃

dsp₂

d₂sp₃

Your comments:

Question 15 of 20

16. Which among the following can form linkage isomer?

K₃[Fe(C₂O₄)₃]

[Co(NH₃)₄] [Cr(C₂O₄)₃]

[Cr(H₂O)₅SCN]³⁺

[Co(NH₃)₅Br]²⁺SO₄^2-

Your comments:

Question 16 of 20

17. According to VBT, the shape of [CoF₆]^-3 is:

Tetrahedral

Octahedral

Square planar

Trigonal bipyramidal

Your comments:

Question 17 of 20

18. [Co(NH₃)₄Cl₂]NO₂ and [Co(NH₃)₄Cl(NO₂)]Cl exhibit which type of isomerism?

Ionisation isomerism

Linkage isomerism

Optical isomerism

Geometrical isomerism

Your comments:

Question 18 of 20

19. All inner orbital complexes are low spin complexes.

True

False

Depends on the complex

None of these

Your comments:

Question 19 of 20

20. Which would exhibit ionisation isomerism?

K₃[Fe(C₂O₄)₃]

[Co(NH₃)₅Br]SO₄

[Co(NH₃)₄] [Cr(C₂O₄)₃]

K₃[Fe(CN)₆]

Your comments:

Question 20 of 20

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