10-minute Quiz : Chapter 26 Intermolecular forces

Which of the following substances does NOT form hydrogen bonds between its molecules?

• A. Propane-1,2-diol
• B. Ammonia
• C. Hydrogen chloride
• D. Ethanoic acid

Consider the three compounds. Which of the following correctly arranges the compounds in increasing order of boiling point?

• A. X, Y, Z

• B. Y, X, Z

• C. Z, X, Y

• D. Z, Y, X

Which of the following pairs of molecules would form hydrogen bonds with each other?

(1) Pentane and water

(2) Hydrogen fluoride and methanol

(3) Bromine and methanoic acid

• A. (1) only

• B. (2) only

• C. (1) and (3) only

• D. (2) and (3) only

Consider the following statements and choose the best answer:

1st statement

Ne has a higher boiling point than Ar.

2nd statement

Ne has a larger molecular size than Ar.

• A. Both statements are true and the 2nd statement is a correct explanation of the 1st statement.

• B. Both statements are true but the 2nd statement is NOT a correct explanation of the 1st statement.

• C. The 1st statement is false but the 2nd statement is true.

• D. Both statements are false.

Which of the following liquids has the highest viscosity?

• A. (CH₃)₃COH
• B. CH₃CH₂CH₂CH₂OH
• C. CH₃COOCH₂CH₃
• D. CH₂(OH)CH₂CH₂CH₂OH

Which of the compounds has the highest boiling point?

• A

• B

• C

• D

A part of the structure of polyvinyl alcohol (PVA) is shown in the diagram. PVA is soluble in water. Which of the following statements best explains this phenomenon?

• A. PVA can be broken down by water.

• B. PVA has a large molecular size.

• C. PVA undergoes ionization in water.

• D. PVA molecules can form hydrogen bonding with water molecules.

Propane has a higher boiling point than ethane because

• A. propane is polar while ethane is non-polar.
• B. the covalent bonds in propane molecules are stronger than those in ethane molecules.
• C. propane molecules contain more covalent bonds than ethane molecules.
• D. propane has a larger molecular size than ethane.

The structure of ethanal is shown in the diagram. Which of the following statements about ethanal are correct?

(1) It is soluble in water.

(2) Its molecules are held together by hydrogen bonds.

(3) Its molecules are held together by van der Waals’ forces.

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (3) only

• D. (1), (2) and (3)

Which of the following gases CANNOT be collected by using the set-up as shown in the diagram?

(1) Hydrogen chloride

(2) Tetrachloromethane

(3) Chlorine

• A. (1) only

• B. (2) only

• C. (1) and (3) only

• D. (2) and (3) only