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Lesson Worksheet: Hydrogen Bonding Chemistry

In this worksheet, we will practice describing and explaining hydrogen bonding and the effect it has on the physical properties of molecules.

Q1:

Which of the following molecules has the highest boiling point?

  • AHCl
  • BHS2
  • CHO2
  • DNH3

Q2:

Which of the following correctly compares hydrogen fluoride with water?

  • AWater molecules have a stronger hydrogen bonding than hydrogen fluoride molecules due to the presence of 2 lone pairs of electrons on oxygen atoms.
  • BHydrogen fluoride molecules have a stronger hydrogen bonding because there is a higher difference of electronegativity between their atoms than there is between atoms of water molecules.
  • CWater molecules have a stronger hydrogen bonding because there is a higher difference of electronegativity between their atoms than there is between atoms of hydrogen fluoride molecules.
  • DHydrogen fluoride molecules have a stronger hydrogen bonding than water molecules due to the absence of lone pairs of electrons.

Q3:

The following compounds can form a hydrogen bond except for .

  • AHO2
  • BNH3
  • CHS2
  • DHF

Q4:

Why does HO2 have a higher boiling point than HS2?

  • ADue to the number of lone pairs in HO2, which is more than the number of lone pairs in HS2
  • BDue to consuming a large amount of thermal energy to break the hydrogen bonds formed between HS2 molecules
  • CDue to the bond angle in HO2, which is greater than the bond angle in HS2
  • DDue to consuming a large amount of thermal energy to break the hydrogen bonds formed between HO2 molecules

Q5:

Why is the hydrogen bond between HO2 molecules stronger than that between NH3 molecules?

  • ADue to the higher difference in electronegativity between nitrogen and hydrogen atoms than that found between oxygen and hydrogen atoms
  • BDue to the higher difference in electronegativity between oxygen and hydrogen atoms than that found between nitrogen and hydrogen atoms
  • CDue to the presence of 2 lone pairs of electrons on the oxygen atoms in water molecules
  • DDue to the presence of 1 lone pair of electrons on the nitrogen atoms in ammonia molecules

Q6:

Which of the following is not correct about hydrogen bonds?

  • AThey are formed in a straight line with the polar covalent bonds in a compound.
  • BThey are stronger than covalent bonds.
  • CThe hydrogen atom must exist between two atoms of high electronegativity.
  • DThey affect the physical properties of compounds, causing an increase in their boiling points.

Q7:

Molecules of HF, HO2, and NH3 are all able to form hydrogen bonds. What property of a molecule gives it the ability to form a hydrogen bond?

  • AA large difference in electronegativity between hydrogen and the atom it is bonded to
  • BThe number of hydrogen atoms covalently bonded to an atom of a different element
  • CThe ability to conduct electricity in aqueous solutions
  • DWhether the molecular geometry of the molecule is linear or bent
  • EThe molecule consisting of a metal bonded to a nonmetal

Q8:

The electronegativities of nitrogen (3.04) and bromine (2.96) are very similar; however, nitrogen has a much greater ability to form hydrogen bonds than bromine. How can this difference in hydrogen-bonding ability be rationalized?

  • AAn atom of bromine contains more protons in its nucleus and so attracts an atom of hydrogen strongly enough to form covalent bonds instead of hydrogen bonds.
  • BBromine can only form one bond with an atom of hydrogen, whereas nitrogen can form three, giving it a greater ability to hydrogen bond.
  • CAn atom of bromine is more reactive than an atom of nitrogen and so easily forms covalent bonds, leaving it with no lone pairs with which to hydrogen bond.
  • DAn atom of nitrogen contains more lone pairs than an atom of bromine, giving it a greater ability to form hydrogen bonds.
  • EThe larger size of a bromine atom means it has weaker forces of attraction to hydrogen atoms on other adjacent molecules.

Q9:

Which of the following compounds could be able to form hydrogen bonds between its molecules?

  • A
    CCH3CH3O
  • B
    OCH3CH3
  • C
    CCH3OOH
  • D
    CHOCH3

Q10:

Which of the following correctly compares a hydrogen bond and a covalent bond?

  • AA hydrogen bond has a longer bond length and a weaker bond strength than those of a covalent bond in the same molecule.
  • BA hydrogen bond has a longer bond length and a stronger bond strength than those of a covalent bond in the same molecule.
  • CA hydrogen bond has a shorter bond length and a stronger bond strength than those of a covalent bond in the same molecule.
  • DA hydrogen bond has a shorter bond length and a weaker bond strength than those of a covalent bond in the same molecule.

This lesson includes 17 additional questions for subscribers.

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