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WorksheetsChapter 26 - Understanding Intermolecular Forces
Total questions: 10
Worksheet time: 7mins
Which of the following statements about hydrogen bromide (HBr) are correct?
(1) Atoms within its molecules are held together by covalent bonds.
(2) Its molecules are held together by van der Waals’ forces.
(3) Its molecules are held together by hydrogen bonds.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
Which of the following molecules are held together by van der Waals’ forces and hydrogen bonds?
Hydrogen sulphide
Chloromethane
Carbon dioxide
Ammonia
Which of the following gives the correct order of boiling points of H2O, HCl and HF?
H2O > HCl > HF
H2O > HF > HCl
HF > HCl > H2O
HF > H2O > HCl
Which of the following gives the correct order of increasing melting point for the substances shown below?
(1) CH3CH2CH2CH3
(2) CH3CH2CH2CH2CH3
(3) CH3CH2CH2CH2OH
(1), (2), (3)
(2), (1), (3)
(3), (2), (1)
(3), (1), (2)
The ability of a liquid to flow is linked to the strength of its intermolecular forces. Suggest which of these liquids flows the slowest when poured.
Propane-1,2,3-triol
Propane-1,2-diol
Pentane
Butane
Consider the following molecule:
How many hydrogen atoms in this molecule can form hydrogen bonds?
1
4
5
6
Which of the following statements about ethanoic acid are correct?
(1) The atoms in the molecule are held together by covalent bonds.
(2) The molecules are held together by van der Waals’ forces.
(3) The molecules are held together by hydrogen bonds.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
C2H6, CH3OH and CH3F are three compounds with comparable molecular masses. Which of the following shows the ascending order of their boiling points?
C2H6 < CH3OH < CH3F
CH3F < CH3OH < C2H6
CH3OH < CH3F < C2H6
C2H6 < CH3F < CH3OH
Which of the following statements about water (H2O) and hydrogen peroxide (H2O2) are correct?
(1) Both water and hydrogen peroxide consist of polar molecules.
(2) Hydrogen bonds exist between water molecules and hydrogen peroxide molecules respectively.
(3) Hydrogen peroxide has a higher boiling point than water.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
Substance X is composed of discrete molecules. The melting point of X is 260 K and the boiling point is 380 K. X is soluble in non-polar solvents and insoluble in aqueous solvents. Which of the following deductions concerning X is INCORRECT?
X must not be able to conduct electricity.
X must contain hydrogen and carbon only.
X must not form hydrogen bonds with molecules.
X must be a liquid at room conditions.
