General Organic Chemistry

Fill in the blank for the combustion of propane:

Don't forget to balance the missing part.

• 5O2

• 5O

• 6O2

• 6O

What is the definition of a hydrocarbon?

• A molecule which contains hydrogen and carbon atoms only.

• A molecule which contains hydrogen and carbon.

• A molecule which contains single bonds only.

• A molecule which contains single bonds.

Which of the following is the general formula for alkenes?

• C_nH_2n+2

• C_nH_2n

• C_2nH_n+2

• C_2nH_n

What happens when you add an alkene to bromine water? What type of reaction is this?

• The bromine water would change to a pink colour. This is a substitution reaction because the bromine molecule is added across the double bond.

• The bromine water would decolourise. This is a substitution reaction because the bromine is being added across the double bond.

• The bromine water would decolourise. This is an addition reaction because the bromine is being added across the double bond.

• The reaction bromine water turns pink This is an addition reaction because the bromine is being added across the double bond

Which two atoms are in a hydroxyl group?

• oxygen and sulphur

• oxygen and carbon

• hydrogen and sulphur

• hydrogen and oxygen

What is the name for the -COOH function group?

Which one of the following statements is incorrect?

• Hydrocarbons with a short carbon chain length have a lower boiling point. So they condense at the top of the fractional column.

• Hydrocarbons with a long carbon chain lengths have a lower boiling point. So they condense at the top of the fractional column.

Is pentane a saturated or unsaturated hydrocarbon?

• Saturated

• unsaturated

Is the following compound a hydrocarbon?

NaOH

Give your answer as yes or no only.

• YES

• NO

Which of the following will undergo addition reactions?

• CH₄

• C₃H₈

• C₂H₆

• C₂H₄