1. Explain why carbon dioxide gas, CO₂, is a gas at room temperature

Question 1 of 22

2. Explain the term hydrocarbon

Question 2 of 22

3. Do larger molecules have higher or lower boiling points than smaller molecules?

Question 3 of 22

4. What is the name of the process in which crude oil is separated into its various components?

Question 4 of 22

5. In car engines, sparks cause the formation of some gases which contribute to acid rain. What are these gases?

Question 5 of 22

6. A pupil has tried to write down various ways of representing ethane using: molecular formula, displayed formula, general formula, empirical formula and stuctural formula. However she has missed one out. Which one?

Question 6 of 22

7. How does sulfur dioxide form in car engines?

Question 7 of 22

8. Recall a use for each of the 6 fractions obtained from the fractional distillation of crude oil

Question 8 of 22

9. In the fractional distillation of crude oil, how does viscosity change as the chains get longer?

Question 9 of 22

10. Balance the following equation: WO₃ + H₂ → W + H₂O

Question 10 of 22

11. What is a fuel?

Question 11 of 22

12. Name this molecule

Question 12 of 22

13. State the general formula of alkanes

Question 13 of 22

14. What is crude oil?

Question 14 of 22

15. Write a chemical equation for the complete combustion of propane

Question 15 of 22

16. Name the greenhouse gas released from burning hydrocabons

Question 16 of 22

17. Explain the term homologous series

Question 17 of 22

18. Explain the term saturated

Question 18 of 22

19. Write the chemical equation for sulfur dioxide dissolving in water to form acid rain

Question 19 of 22

20. What is the molecular formula for hexane?

Question 20 of 22

21. A student has been asked to draw all the alkene isomers of C₄H₈ and draws the following. Which of the following statements about the student's diagram is correct?

Question 21 of 22

22. Why does incomplete combustion occur?

Question 22 of 22