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Free Dipole Moment MCQs with Answers

29 Dipole Moment MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

Dipole moment measures the separation of positive and negative charge in a bond or molecule, with magnitude related to charge and distance, μ = q r. Questions distinguish polar bonds from polar molecules by considering bond direction, molecular geometry and whether individual bond moments cancel through symmetry.

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29 questions · page 2 of 2

21. All the halogens are _ molecules.

  • A. Polar
  • B. Non-polar
  • C. Reactive
  • D. Non-reactive

Explanation: Option BHalogen are non polar , discrete diatomic in all phases( gas,liquid,solid).

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Correct answer: Non-polar

22. Which of the following species has a permanent dipole moment?

  • A. SF4
  • B. SiF4
  • C. BF3
  • D. XeF4

Explanation: SF4 has sp3d hybridization so possesses a seesaw structure and has a permanent dipole moment.

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Correct answer: SF4

23. _ has dipole moment.

  • A. CO
  • B. CO2
  • C. Benzene
  • D. All of these

Explanation: In the free carbon monoxide molecule, a net negative charge δ- remains at the carbon end and the molecule has a small dipole moment of…

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Correct answer: CO

24. If the electronegativity difference between bonded atoms is zero, the bond between the two atoms is:

  • A. Polar
  • B. Partially Ionic
  • C. Non-polar
  • D. Both B and C

Explanation: Explanation:If the electronegativity difference between bonded atoms is zero, the bond between the two atoms is non-polar.This option is…

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Correct answer: Non-polar

25. Which one of the following molecules has zero dipole moment?

  • A. NH3
  • B. CHCl3
  • C. BF3
  • D. H2O

Explanation: A is incorrect because NH3 molecule has dipole moment 1.49B is incorrect because CHCl3 molecule has dipole moment 1.01C is correct since…

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Correct answer: BF3

26. Which one is non-polar but contains polar bonds:

  • A. HCl
  • B. HF
  • C. H2O
  • D. CO2

Explanation: CO2 is the correct answer because even though it contains polar bonds between C and O, its linear molecular geometry results in the…

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Correct answer: CO2

27. Which of the following bonds is the least polar?

  • A. B....Cl
  • B. C....Cl
  • C. C....I
  • D. C....Br

Explanation: CI represents the bond between carbon (C) and iodine (I), which has the least electronegativity, resulting in the least polar bond.

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Correct answer: C....I

28. In which of the following a covatent bond is not likely to exist?

  • A. Br
  • B. SiF
  • C. CaO
  • D. SeH2

Explanation: A covalent bond is not likely to exist in CaO. Calcium is a metal, and oxygen is a non-metal.

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Correct answer: CaO

29. Which is the least polar molecule?

  • A. HF
  • B. HI
  • C. HCl
  • D. HBr

Explanation: To determine the polarity of diatomic molecules, we examine the difference in electronegativity between the two atoms.

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Correct answer: HI
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