1. 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 1 of 22

2. Why does incomplete combustion occur?

Question 2 of 22

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

Question 3 of 22

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

Question 4 of 22

5. Name this molecule

Question 5 of 22

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

Question 6 of 22

7. What is the molecular formula for hexane?

Question 7 of 22

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

Question 8 of 22

9. Balance the equation for the reaction: ___ HCl(aq) + ___ MnO₂(s) → ___MnCl₂(aq) + ___H₂O(l) + ___ Cl₂(g)

Question 9 of 22

10. Why can nitrogen react with oxygen in a car engine?

Question 10 of 22

11. Name the greenhouse gas released from burning hydrocabons

Question 11 of 22

12. Explain the term hydrocarbon

Question 12 of 22

13. Explain the term homologous series

Question 13 of 22

14. How does sulfur dioxide form in car engines?

Question 14 of 22

15. Explain why methane gas, CH₄, is a gas at room temperature

Question 15 of 22

16. What is crude oil?

Question 16 of 22

17. Recall the names of the main fractions obtained from crude oil, in order of lowest boiling point first

Question 17 of 22

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

Question 18 of 22

19. 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 19 of 22

20. Explain the term saturated

Question 20 of 22

21. Which fraction of crude oil has the lowest boiling point?

Question 21 of 22

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

Question 22 of 22


 

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