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Group Theory and Molecular Symmetry

Tests knowledge of molecular point groups, symmetry elements, and identification of symmetry classifications for various chemical structures including organic and inorganic molecules.

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Point group in cis-platin is ____________.

  1. C4v
  2. C2v
  3. D2h
  4. D4h
  5. C3v
Question 2 Multiple Choice (Single Answer)

Point group of trans-1, 2-dichloroethene is __________.

  1. C2v
  2. C2h
  3. D2h
  4. D2d
  5. D2
Question 3 Multiple Choice (Single Answer)

Which of the following molecules is an example of C∞v point group?

  1. HCN
  2. CCl4
  3. NH3
  4. BCl3
  5. CH2Cl2
Question 4 Multiple Choice (Single Answer)

Which of the following is not an example of D∞h point group?

  1. H2
  2. HCl
  3. CO2
  4. N2
  5. C2H2
Question 5 Multiple Choice (Single Answer)

Which of the following molecules is an example of Cs point group?

  1. CO2
  2. HCl
  3. CH2BrCl
  4. CHCl3
  5. CH4
Question 6 Multiple Choice (Single Answer)

Point group of trigonal bi-pyramidal AB5 type molecule is __________.

  1. C3v
  2. C5v
  3. D3h
  4. D3
  5. D5h
Question 7 Multiple Choice (Single Answer)

Point group in beryllium difluoride is _________.

  1. C∞v
  2. D∞v
  3. D∞
  4. D∞h
  5. C∞
Question 8 Multiple Choice (Single Answer)

D2h point group means ____________.

  1. 2 C2's and 1 horizontal plane
  2. 2 C2's and 2 horizontal planes
  3. 1 C2 and 1 horizontal plane
  4. 1 C2, 2 C2's perpendicular to C2 and 1 horizontal plane
  5. 1 C2, 1 C2 perpendicular to C2 and 1 horizontal plane
Question 9 Multiple Choice (Single Answer)

Which of the following molecule(s) belong to D∞h point group?

  1. CO
  2. HCN
  3. CO2
  4. O2
  1. 1 and 2
  2. 1 and 3
  3. 2 and 3
  4. 2 and 4
  5. 3 and 4
Question 10 Multiple Choice (Single Answer)

Which of the following statements is not correct about trans-C2H2Cl2?

  1. It has one C2 symmetry element.
  2. Structure of this molecule is non planar.
  3. Two chlorine atoms are opposite to each other.
  4. It has one horizontal plane.
  5. Point group of this molecule is C2h.
Question 11 Multiple Choice (Single Answer)

Point group of allene (CH2=C=CH2) is ___________.

  1. D2h
  2. D2d
  3. C2v
  4. D∞h
  5. C∞v
Question 12 Multiple Choice (Single Answer)

Which of the following statements is not true about BF3 molecule?

  1. The structure is trigonal planar.
  2. The principal axis of rotation is C3.
  3. It has one vertical plane of symmetry.
  4. It has one horizontal plane of symmetry.
  5. It has three C2 elements of symmetry.
Question 13 Multiple Choice (Single Answer)

Which of the following is true about the structure of C2H2 molecule?

  1. Infinite number of vertical planes
  2. Infinite number of horizontal planes
  3. Non-linear structure
  4. C4 principal axis of rotation
  5. Two horizontal planes of symmetry
Question 14 Multiple Choice (Single Answer)

Which of the following molecules is an example of C1 point group?

  1. CH4
  2. CHCl3
  3. CH2ClBr
  4. CHFClBr
  5. CCl4
Question 15 Multiple Choice (Single Answer)

Which of the following matches of point group : example is incorrect?

  1. C2v : H2O2
  2. D3h : BF3
  3. C3h : B(OH)3
  4. D4d : S8
  5. Oh : SF6
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