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.

electrons

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1

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 number of hydrogen atoms in the molecule

the strength of the covalent bond(s) in the molecule

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1

Which noble gases has the lowest boiling point?

helium

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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 a higher molecular mass

HCl has more electrons

HCl has permanent dipole-dipole forces

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Give three properties of water that are influenced by hydrogen bonding?

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3

What type of intermolecular forces are present in iodine molecules, I2?

permanent dipole-dipole forces only

induced dipole-dipole forces only

both permanent and induced dipole-dipole forces

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1

What intermolecular forces are present in molecules of hydrogen iodide, HI?

(Select all that apply).

covalent bonding

induced dipole-dipole forces

hydrogen bonding

permanent dipole-dipole forces

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2

Polar covalent substances dissolve in polar solvents because the polar solute molecules and polar solvent molecules...

repel each other

have weak intermolecular forces

have strong covalent bonds

attract each other

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1

What is a hydrogen bond?

a type of covalent bond

a type of ionic bond

a type of permanent dipole-dipole force

a type of metallic bond

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Which trio of atoms can form hydrogen bonds?

N, O and F

O, F and Cl

F, Cl and Br

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 further apart than water molecules

ice has fewer hydrogen bonds than water

ice molecules are closer together than water molecules

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Which of the following molecules has the lowest boiling point?

HCl

CH4

NH3

H2O

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1

Hydrogen bonds form between molecules that have a atom bonded to a very atom with a lone pair of electrons.

hydrogen
electronegative

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2

Select ALL of the intermolecular forces that are present in molecules of hydrogen fluoride, HF.

covalent bonding

induced dipole-dipole forces

hydrogen bonding

permanent dipole-dipole forces

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3

How many hydrogen bonds can each molecule of H2O form?

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1

2

3

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Which type of intermolecular force exists between all molecules?

hydrogen bonding

permanent dipole-dipole forces

induced dipole-dipole forces

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1

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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1

Which molecules are capable of hydrogen bonding?

(Select all that apply).

NH3

CH4

HCl

H2O

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2

Which molecule has the higher solubility in water?

C3H8

C2H5OH

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1

Which molecule has the lower boiling point?

CH3OH

C2H6

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Select TWO properties of simple molecular substances:

conduct electricity 

unable to conduct electricity

high boiling points

low boiling points

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2

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.

intermolecular
energy
gas

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3