1. A hydrocarbon contains 90 % by mass of carbon. What is its empirical formula?

2. In which of the following are all the compounds members of the same homologous series?

3. Alkanes are a homologous series of organic compounds.

            Which statement about alkanes is correct?

4. Four of the products of the fractional distillation of petroleum are diesel oil, gasoline, kerosene and lubricating oil.

            In which order do they distil off, lowest boiling point first?

5. Two different hydrocarbons each contain the same percentage by mass of hydrogen.

It follows that they have the same

6. The two statements are about the fractional distillation of crude oil. The statements may or may not be correct. They may or may not be linked.

statement 1; Fractional distillation is used to separate crude oil into useful fractions.

statement 2; The fractions with lower boiling points are found at the top of the fractionating column.

What is correct about these two statements?

7. Which statement about neighbouring members of all homologous series is correct?

8. What is the IUPAC name for CH₃CH₂CH(CH₃)₂?

9. Consider the following equation.

2C₄H₁₀(g) + 130₂(g) ………. 8CO₂(g) + 10H₂O(1)

          How many moles of CO₂(g) are produced by the complete combustion of 58 g of butane, C₄H₁₀ (g)?

10. Which two molecules contain the same number of hydrogen atoms?