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

Question 1 of 22

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

Question 2 of 22

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

Question 3 of 22

4. Name this molecule

Question 4 of 22

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

Question 5 of 22

6.

A student has been asked to draw all the alkene isomers of C₄H₁₀ and draws the following. Which of the following statements about the student's diagram is correct?

Question 6 of 22

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

Question 7 of 22

8. Why are alkanes classified as saturated hydrocarbons?

Question 8 of 22

9. What is the molecular formula for hexane?

Question 9 of 22

10. Describe how nitrogen oxides and sulfur dioxide contribute to acid rain

Question 10 of 22

11. What is crude oil?

Question 11 of 22

12. What is a substance called if it, when burned, releases heat energy?

Question 12 of 22

13. Name the greenhouse gas released from burning hydrocabons

Question 13 of 22

14. Why does incomplete combustion occur?

Question 14 of 22

15. Explain the term hydrocarbon

Question 15 of 22

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

Question 16 of 22

17. How does sulfur dioxide form in car engines?

Question 17 of 22

18. State the names and molecular formulae of the first 5 alkanes

Question 18 of 22

19. Explain the term homologous series

Question 19 of 22

20. Why is the boiling point of a larger molecule higher than that of a smaller molecule?

Question 20 of 22

21. Recall all the possible products of the incomplete combustion of alkanes

Question 21 of 22

22. Describe the trend in viscosity of the main fractions in crude oil

Question 22 of 22