Hydrocarbons

Multiple Choice Quiz

Try this as often as you like.
You will get a different set of questions each time you attempt this quiz.

What is the main component of natural gas?
1. Methane
2. Ethane
3. Propane
4. Ethene
In hydrocarbons, the C and H bonds are joined together by
1. covalent ions
2. hydrogen bonds
3. ionic bonds
4. dipole-dipole attractions
Coal is formed from
1. dead wood of ancient forests
2. marine animals that died millions of years ago
3. dead animals that existed millions of years ago
4. compressed natural gas
Which one of these is not a source of methane gas?
1. Burning coal
2. Ruminating animals such as cattle, sheep and pigs
3. Anaerobic decomposition of animal waste
4. Slurry pits
5. Refuse dumps
Which one of the following carbon compounds is considered to be an organic compound?
1. Methane
2. Carbon dioxide
3. Carbon monoxide
4. Calcium carbonate
Select three properties of aliphatic hydrocarbons.
1. They generally contain straight chains.
2. They may contain branched chains.
3. They may contain ring structures.
4. They all contain double bonds.
5. They are very unreactive.
Which two of the following are aromatic hydrocarbons?
Organic compounds are separated into groups called homologous series.
Which one of the following is not a property of a homologous series?
1. They have similar physical properties.
2. All members have the same general formula.
3. Successive members differ by CH₂.
4. They have similar chemical properties.
The naming of organic compounds follows a definite pattern, depending on the number of carbon atoms in its longest chain.
Select the correct root for the molecule that has 5 carbon atoms in its longest chain.
1. pent-
2. hept-
3. eth-
4. prop-
5. but
The general formula for the alkanes is
1. C_NH_2N+2
2. C_NH_2N
3. C_NH_2N-2
4. C_NH_2N+1
The formula that shows how atoms are arranged in a molecule is called the
1. structural formula
2. actual formula
3. molecular formula
4. empirical formula
The diagram shows the structural formula for which molecule?
1. hexane
2. heptane
3. propane
4. octane
5. butane
Select the correct structure of propane from those shown below:
Compounds that have the same molecular formula, but different structural formula are known as
1. isomers
2. polymers
3. isotopes
4. monomers
The isomer shown is known as
1. 2-methylbutane
2. 3-methylbutane
3. pentane
4. methylpentane
Which one of the following isomers is that of 2,2,4-trimethylpentane?
The general formula for the alkenes is
1. C_NH_2N
2. C_NH_2N+2
3. C_NH_2N-2
4. C_NH_2N+1
The general formula for the alkynes is
1. C_NH_2N-2
2. C_NH_2N
3. C_NH_2N+2
4. C_NH_2N+1
What is the name of the hydrocarbon shown?
1. 3-methylpentane
2. 2-ethylbutane
3. 2-dimethylbutane
4. 4-ethylbutane
What is the correct name for CH₃CH(CH₃)CH₂CH₃?
1. 2-methylbutane
2. Pentane
3. 3-methylbutane
4. Methylpentane
The structure shown is called
1. CH₃C(CH₃)₂CH₂CH(CH₃)CH₃
2. CH₃C(CH₃)CH₂CH(CH₃)CH₃
3. CH₃C(CH₃)₂CHCH(CH₃)CH₃
4. CH₃C(CH₃)₂CH₂CH(CH₃)
Which one of the following compounds is an alkyne?
Which one of the following compounds is unsaturated?
The condensed formula and name of this structural molecule is
1. CH₃C(CH₃)₂CH₂CH₃ and 2,2-dimethylbutane
2. CH₃C(CH₃)₂CH₂CH₃ and 2,2-methylbutane
3. CH₃(CH₃)₂CH₂CH₃ and 2,2-dimethylbutane
4. CH₃C(CH₃)CH₂CH₃ and 2,2-dimethylpropane
Which two of the following statements about alkanes are not correct?
1. They are soluble in water.
2. They are highly unreactive.
3. The first four members in the series are gases at normal temperatures and pressures.
4. Alkanes with more than 16 carbon atoms are solid at normal temperatures and pressures.
5. Their boiling points increase with increasing relative molecular mass (M_r).
6. They are non-polar substances.
The name and condensed formula of this alkene is
1. pent-2-ene and CH₃CH=CHCH₂CH₃
2. pent-3-ene and CH₃CH=CHCH₂CH₃
3. pent-2-ene and CH₃(CH₂)CH₃CH₃
4. pent-3-ene and CH₃CH=CHCH₃₃
Butene has three isomers. Select these three isomers from the following:
Which four of the following statements about alkenes are correct?
1. Their general formula is C_NH_2N
2. The C=C bond is their functional group.
3. Alkenes are unsaturated hydrocarbons
4. The boiling points of alkenes increase with relative molecular mass.
5. At normal temperatures and pressures, the first six members are liquids.
6. Alkenes are insoluble in non-polar solvents such as cyclohexane
The general formula of the alkenes is:
1. C_NH_2N
2. C_NH_2N+1
3. C_NH_2N+2
4. C_NH_2N-2
The compound shown is
1. 3,3-dimethylbut-1-ene
2. 2,2-dimethylbutene
3. 2,2-dimethylbut-1-ene
4. pentene
Which three of the following are properties of alkynes?
1. The lower members are gases at normal temperatures and pressures.
2. Alkynes have similar physical properties.
3. Alkynes are soluble in non-polar solvents like methylbenzene.
4. Their general formula is C_NH_2N+2
5. They are all soluble in water.
Select four properties of simple aromatic compounds from the following list:
1. They contain a benzene ring.
2. They are generally insoluble in water.
3. Their boiling points increase with relative molecular mass.
4. They are soluble in non-polar solvents.
5. They contain C=C bonds in their ring structure.
6. The lighter aromatic compounds are gases at room temperature.
Why is benzene not permitted to be used in school laboratories?
1. It is classified as carcinogenic (cancer inducing).
2. It is highly flammable.
3. It is too expensive.
4. It reacts explosively with water.
The benzene molecule is correctly represented by
In a laboratory experiment, students tested the solubility of different solutes in methylbenzene. They made a table as shown. However, two of these results are incorrect. Select the two incorrect results from the list below
1. Salt water and octane
2. Salt water and cyclohexane
3. Cooking oil and water
4. Cyclohexane and iodine
TRUE or FALSE?
An exothermic reaction is one where heat is released
1. TRUE
2. FALSE
How can you determine if a reaction is endothermic?
1. The temperature of the system decreases.
2. The temperature of the system increases.
3. The temperature of the system remains constant.
4. There is a colour change.
What is the IUPAC name of the following compound?
1. 3,3,4-trimethylhexane
2. 3,4,4-trimethylhexane
3. 4-ethyl-3,4-dimethylpentane
4. 2-ethyl-2,3-dimethylpentane
Which of the following organic compounds is an alkyne?
1. C₄H₆
2. C₆H₆
3. C₂H₄
4. C₈H₁₈