(Not Double Science - Chemistry GCSE Only)

1. The structures of four organic compounds are shown:

4 organic molecules

  

Which statement is NOT correct?

  • A.   Only three of the compounds are hydrocarbons
  • B.   Only two of the compounds are alkenes
  • C.   Only one of the compounds is unsaturated
  • D.   Only one of the compounds is an alcohol
2. Decane (C10H22) can be split into propene (C3H6) and heptane (C7H16) by cracking. These 3 molecules can all be described as ..
  • A.   alkanes
  • B.   alkenes
  • C.   saturated
  • D.   hydrocarbons

Q3-5 Alkenes can react with many substances and can be used to make polymers.

3. The equation for the reaction between ethene and bromine water is …

  
ethene bromine reaction

4. The correct equation for the polymerization of ethene is …..

ethene_polymer_x4
5. Propene reacts with hydrogen when heated in the presence of a nickel catalyst. The product formed and the type of reaction occurring is ….  
  Product formed Type of reaction
A propanol addition
B propanol oxidation
C propane addition
D propane oxidation

 

6. Compound X and compound Y were both added separately to aqueous bromine.

molecules X and Y

The observations made would be that the bromine solution …..

 
  Compound X Compound Y
A Remains orange Remains orange
B Remains orange Turns from colourless to orange
C Turns from orange to colourless Remains orange
D Turns from orange to colourless Turns from colourless to orange

7. The polymer PVA is used in paints and adhesives. It has the following structural formula:

The type of polymerization used to make PVA and the structural formula of the monomer is:

  
  Type of Polymer Monomer Formula
A addition PVA_A
B addition PVA_B
C condensation PVA_A
D condensation PVA_B

Q8 – 9: Ethanol is present in alcoholic drinks and is produced by the fermentation of carbohydrates such as glucose.

  

8. The conditions used for fermentation are …..

  • A.   add yeast, temperature of about 30°C
  • B.   add manganese(IV)oxide, temperature of about 30°C
  • C.   add yeast, temperature above 70°C
  • D.   add manganese(IV)oxide, temperature above 70°C
9. The products formed in the fermentation of glucose are ethanol and…..
  • A.   carbon dioxide
  • B.   oxygen
  • C.   hydrogen
  • D.   water
10. CH3OH, C2H5OH and C3H7OH are the first three members of the alcohol family.  Deduce the general formula for the family of alcohols:
  • A.   CnH2n-1OH
  • B.   CnH2nOH
  • C.   CnH2n+1OH
  • D.   CnH2n+2OH