Q1-2  Alkanes and alkenes both react with halogens under different conditions.

• A.   pressure
• B.   ultraviolet light
• C.   catalyst
• D.   heat

2. The equation for the reaction between propane and chlorine is ..

• A.   C₃H₆ + Cl₂  → C₃H₅Cl + HCl
• B.   C₃H₆ + Cl₂  → C₃H₆Cl₂  
• C.   C₃H₈ + Cl₂  → C₃H₆Cl₂ + H₂
• D.   C₃H₈ + Cl₂  → C₃H₇Cl + HCl

3. Isomers are molecules with …..

4. The diagram shows the formula of a molecule found in crude oil.

Which hydrocarbon is an isomer of this compound?

• A.   propane
• B.   butane
• C.   pentane
• D.   hexane

5. The hydrocarbon C₄H₈ belongs to the homologous series of alkenes and has several isomers. The formula for one of these isomers is:

Another isomer of C₄H₈ which belongs to the same homologous series is:

6. CH₃OH, C₂H₅OH and C₃H₇OH are the first three members of the alcohol family.  Deduce the general formula for the family of alcohols:

• A.   C_nH_2n-1OH
• B.   C_nH_2nOH
• C.   C_nH_2n+1OH
• D.   C_nH_2n+2OH

7. Glucose can be fermented both in the presence and in the absence of air producing different products. Select the main organic product produced in each case:

Q8-9: Ethanol is oxidized to compound Y when heated with potassium dichromate(VI) in dilute sulfuric acid.

• A.   carbon dioxide
• B.   ethene
• C.   ethyl ethanoate
• D.   ethanoic acid

• A.   from orange to colourless
• B.   from orange to green
• C.   from green to colourless
• D.   from green to orange

10. Ethanoic acid is a member of the homologous series of carboxylic acids. The structural formula and empirical formula of the fourth member of this series is …