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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- A. has an even number of atoms
- B. contains at least one lone pair
- C. the individual bond dipoles do not cancel because of the molecular shape
- D. contains hydrogen
Explanation: Carbon dioxide has two strongly polar bonds but is linear, so the two dipoles point in opposite directions and cancel, leaving a non polar…
Correct answer: the individual bond dipoles do not cancel because of the molecular shape- A. H2O
- B. NH3
- C. HCl
- D. CCl4
Explanation: Tetrachloromethane has four polar carbon to chlorine bonds arranged symmetrically about the central carbon, so the four dipoles cancel…
Correct answer: CCl4- A. debye units
- B. joules
- C. angstroms
- D. moles
Explanation: Dipole moment is the product of the magnitude of the separated charge and the distance between the centres of charge, and it is quoted in…
Correct answer: debye units- A. the two atoms become more similar
- B. the electronegativity difference between the two atoms increases
- C. the bond becomes shorter
- D. the temperature rises
Explanation: The greater the electronegativity difference, the more unequally the pair is shared, until at a difference of roughly 1.7 the bond is…
Correct answer: the electronegativity difference between the two atoms increases- A. the sharing of a pair of electrons between two atoms
- B. the complete transfer of electrons from a metal to a non metal
- C. the overlap of two half filled orbitals
- D. the delocalisation of electrons over a lattice of cations
Explanation: Transfer produces oppositely charged ions held by electrostatic attraction, which is why ionic compounds have high melting points and…
Correct answer: the complete transfer of electrons from a metal to a non metal- A. purely ionic
- B. polar covalent, with the shared pair drawn towards chlorine
- C. non polar covalent
- D. metallic
Explanation: Chlorine is more electronegative than hydrogen, so the shared electrons sit closer to it, giving chlorine a partial negative charge and…
Correct answer: polar covalent, with the shared pair drawn towards chlorine- A. the carbon to chlorine bonds are non polar
- B. the four polar bonds are arranged symmetrically so their dipoles cancel
- C. chlorine and carbon have the same electronegativity
- D. the molecule is planar
Explanation: Each bond carries a substantial dipole, but the tetrahedral symmetry means the four vectors sum to zero, leaving the molecule non polar…
Correct answer: the four polar bonds are arranged symmetrically so their dipoles cancel- A. HF
- B. HCl
- C. HBr
- D. HI
Explanation: Fluorine is the most electronegative element, so the difference from hydrogen is largest in hydrogen fluoride and the shared pair is most…
Correct answer: HF- A. the sharing of electrons between two adjacent atoms
- B. the attraction between a lattice of positive ions and a sea of delocalised electrons
- C. the transfer of electrons from one metal atom to another
- D. hydrogen bonding between metal atoms
Explanation: The valence electrons are free to move throughout the whole structure, which accounts for electrical and thermal conductivity, lustre and…
Correct answer: the attraction between a lattice of positive ions and a sea of delocalised electrons- A. covalent bonds
- B. ionic bonds
- C. London dispersion forces
- D. hydrogen bonds
Explanation: Iodine molecules are non polar, so the only attraction available is the temporary induced dipole force, which nonetheless grows large…
Correct answer: London dispersion forces- A. 1
- B. 2.3
- C. 0
- D. 1.8
Explanation: CS2 is a linear, symmetrical molecule, so the two equal C=S bond dipoles point in opposite directions and cancel; its net dipole moment is…
Correct answer: 0- A. Pressure
- B. Bond length
- C. Work
- D. Dipole moment
Explanation: Dipole moment measures the separation of positive and negative charge in a bond and is given by μ = q × r, where q is charge and r is the…
Correct answer: Dipole moment- A. HF
- B. CH4
- C. H2
- D. N2
Explanation: HF has a polar covalent bond because fluorine is much more electronegative than hydrogen, so the shared electrons are attracted unequally.
Correct answer: HF- A. H2O
- B. HF
- C. HCI
- D. HBr
Explanation: HF has the greatest electronegativity difference among these hydrogen compounds, so its H-F bond has the highest percentage ionic…
Correct answer: HF- A. Debye
- B. Poise
- C. Pascal
- D. Newton
Explanation: Dipole moment is commonly measured in Debye, where the value depends on the magnitude of separated charge and the distance between the…
Correct answer: Debye- A. Electron affinity
- B. Ionic character
- C. Ionization energy
- D. Dipole moment
Explanation: Dipole moment measures the separation of positive and negative charge in a molecule, so it gives a quantitative measure of molecular…
Correct answer: Dipole moment17. Which of the following is the best explanation that CO2 is non polar molecule __________________?
- A. Linear geometry
- B. Dipole moment is zero
- C. Sp hybridization
- D. None
Explanation: CO2 is linear and symmetrical, so the two equal C=O bond dipoles point in opposite directions and cancel, giving a net dipole moment of…
Correct answer: Dipole moment is zero- A. CCI4
- B. CO2
- C. BF3
- D. none of the above
Explanation: CCl4, CO2 and BF3 all contain polar bonds, but their symmetrical shapes make the bond dipoles cancel, giving each molecule zero net dipole…
Correct answer: none of the above- A. CCl4
- B. AlCl3
- C. CO2
- D. HCl
Explanation: HCl is polar covalent compound as the chloride ion is more electronegative than hydrogen ion.
Correct answer: HCl20. The difference in the E.N values of the bonded atoms b/w two atoms is an index to of covalent bond:
- A. Polar nature
- B. Non-polar nature
- C. Strength
- D. Nature
Explanation: The 'electronegativity of an atom' determines how strongly it attracts electrons to itself.
Correct answer: Polar natureDipole Moment MCQs: common questions
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There are 29 Dipole Moment MCQs in the Chemistry bank, shown 20 to a page with the correct answer and an explanation on each.
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