📚 Part 1: Key Terms and Multiple Choice

Success Criteria: I can define key organic chemistry terms and identify correct statements about hydrocarbons.

1. Match each term to its correct definition by drawing lines:

Hydrocarbon

Alkane

Alkene

Isomer

Compounds with same formula but different structure

Compound containing only carbon and hydrogen

Hydrocarbon with C=C double bond

Saturated hydrocarbon with single bonds only

2. Which statement about alkanes is correct?

They contain double bonds

They are saturated hydrocarbons

They react with bromine water

They have the general formula CnH2n

3. Which of these are properties of alkenes? (Tick all that apply)

Turn bromine water from orange to colourless

Are unsaturated hydrocarbons

Have only single bonds

Can undergo addition reactions

4. The first four alkanes are methane, ethane, propane and __________.

5. Circle the correct general formula for alkenes:

CnH2n+2 CnH2n CnH2n-2 CnHn

6. Complete the table with the missing information:

Alkane Name	Molecular Formula	Number of Carbon Atoms
Methane	CH₄	1
_______	C₂H₆	_______
Propane	_______	3

🧪 Part 2: Structures and Reactions

Success Criteria: I can draw simple hydrocarbon structures and complete word equations for organic reactions.

7. Draw the displayed formula for ethene (C₂H₄) in the box below:

Hint for SEND learners: Remember ethene has a C=C double bond

8. Complete this word equation for the combustion of methane:

methane + __________ → carbon dioxide + __________

9. What happens when ethene reacts with bromine water?

10. Name the two isomers of butane (C₄H₁₀):

1. _________________ 2. _________________

11. Draw the displayed formula for propane (C₃H₈):

12. Complete these addition reactions:

a) ethene + hydrogen → __________

b) propene + __________ → propane

c) but-1-ene + bromine → __________

13. State the test to distinguish between an alkane and an alkene:

🔬 Part 3: Application and Analysis

Success Criteria: I can apply my knowledge to explain observations and suggest uses for organic compounds.

14. Explain why alkenes are more reactive than alkanes:

15. A student tests two unknown gases with bromine water. Gas A turns it colourless, Gas B has no effect. Identify each gas and explain your reasoning:

16. Explain why crude oil needs to be separated by fractional distillation:

17. Compare the boiling points of methane and octane. Explain your answer:

🌍 Part 4: Research Task - Organic Compounds in Everyday Life

Success Criteria: I can research and identify organic compounds in everyday products and explain their uses.

18. Research Task (15 minutes): Use textbooks, tablets, or provided fact sheets to complete this activity.

Your mission: Find THREE different organic compounds used in everyday life and complete the table below.

Organic Compound	Everyday Product/Use	Why is it useful?

SEND Support:

• Work with a partner or in a small group

• Use the provided fact sheets with pictures

• Examples to get you started: ethanol in hand sanitizer, methane in natural gas

19. Choose ONE compound from your research. Explain why society benefits from this compound:

🏆 Part 5: Extension Challenges

Success Criteria: I can apply advanced organic chemistry concepts and solve complex problems.

20. Draw the displayed formulae for the three isomers of pentane (C₅H₁₂):

Higher Ability Challenge:

21. A hydrocarbon has the molecular formula C₄H₈.

a) What type of hydrocarbon is this? Explain your reasoning.

b) Draw TWO possible structural isomers for this compound:

22. Advanced Problem Solving: A student burns 0.1 moles of an unknown alkane and produces 0.3 moles of CO₂. Determine the molecular formula of the alkane and name it.

Working:

Answer: ________________

23. Evaluate the environmental impact of using alkanes as fuels. Consider both benefits and drawbacks:

Differentiation Support Throughout:

• Use the data sheet for formulae and equations if needed

• Key words are highlighted in bold throughout

• Sentence starters available on request

• Visual aids and molecular model kits available

• Extension questions are optional - complete core questions first