Welcome to the Quiz!
This quiz contains 23 questions from a mix of 1 subtopics.
What type of dipole-dipole forces exist between polar molecules?
induced only
permanent only
induced and permanent
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The strength of induced dipole-dipole forces increases with the number of in a molecule.
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Which of the following factors affects the strength of permanent dipole-dipole forces?
the polarity of the molecule
the number of electrons in the molecule
the strength of the covalent bond(s) in the molecule
the number of hydrogen atoms in the molecule
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Which noble gases has the lowest boiling point?
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What is the main reason to explain why hydrogen chloride, HCl, has a higher boiling point than fluorine, F2?
HCl has stronger induced dipole-dipole forces
HCl has more electrons
HCl has permanent dipole-dipole forces
HCl has a higher molecular mass
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Give three properties of water that are influenced by hydrogen bonding?
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What type of intermolecular forces are present in iodine molecules, I2?
induced dipole-dipole forces only
both permanent and induced dipole-dipole forces
permanent dipole-dipole forces only
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What intermolecular forces are present in molecules of hydrogen iodide, HI?
(Select all that apply).
hydrogen bonding
permanent dipole-dipole forces
covalent bonding
induced dipole-dipole forces
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Polar covalent substances dissolve in polar solvents because the polar solute molecules and polar solvent molecules...
have weak intermolecular forces
attract each other
repel each other
have strong covalent bonds
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What is a hydrogen bond?
a type of permanent dipole-dipole force
a type of metallic bond
a type of covalent bond
a type of ionic bond
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Which trio of atoms can form hydrogen bonds?
F, Cl and Br
N, O and F
O, F and Cl
C, N and O
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Why is ice less dense than liquid water?
ice has more hydrogen bonds than water
ice molecules are closer together than water molecules
ice has fewer hydrogen bonds than water
ice molecules are further apart than water molecules
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Which of the following molecules has the lowest boiling point?
CH4
NH3
HCl
H2O
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Hydrogen bonds form between molecules that have a atom bonded to a very atom with a lone pair of electrons.
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Select ALL of the intermolecular forces that are present in molecules of hydrogen fluoride, HF.
hydrogen bonding
covalent bonding
permanent dipole-dipole forces
induced dipole-dipole forces
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How many hydrogen bonds can each molecule of H2O form?
0
1
2
3
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Which type of intermolecular force exists between all molecules?
permanent dipole-dipole forces
hydrogen bonding
induced dipole-dipole forces
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Compare the strength of hydrogen bonds with covalent bonds.
hydrogen bonds are stronger than covalent bonds
hydrogen bonds are weaker than covalent bonds
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Which molecules are capable of hydrogen bonding?
(Select all that apply).
HCl
CH4
NH3
H2O
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Which molecule has the higher solubility in water?
C2H5OH
C3H8
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Which molecule has the lower boiling point?
C2H6
CH3OH
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Select TWO properties of simple molecular substances:
conduct electricity
low boiling points
unable to conduct electricity
high boiling points
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In simple molecular substances, the individual molecules are held together by forces that exist between the molecules. These intermolecular forces are weak and so don't require very much to break. As a result most simple molecular substances exist in the state at room temperature.
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