1. Why is carbon dioxide, CO₂ harmful to the environment?

Question 1 of 22

2. Recall the products of the complete combustion of alkanes

Question 2 of 22

3. State the problem associated with sulfur dioxide in the atomosphere?

Question 3 of 22

4. 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 4 of 22

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

Question 5 of 22

6. How does sulfur dioxide form in car engines?

Question 6 of 22

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

Question 7 of 22

8. Why are alkanes classified as saturated hydrocarbons?

Question 8 of 22

9. 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 9 of 22

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

Question 10 of 22

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

Question 11 of 22

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

Question 12 of 22

13. Explain the term isomerism

Question 13 of 22

14. Name this molecule

Question 14 of 22

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

Question 15 of 22

16. Explain the term hydrocarbon

Question 16 of 22

17. What does volatile mean? Which fraction of crude oil is the most volatile?

Question 17 of 22

18. Why does incomplete combustion occur?

Question 18 of 22

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

Question 19 of 22

20. What is the molecular formula for hexane?

Question 20 of 22

21. What is crude oil?

Question 21 of 22

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

Question 22 of 22


 

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