(Not Double Science - Chemistry GCSE Only)
1. Which statement about alkane molecules is correct?
  • A.   They contain carbon, hydrogen and oxygen
  • B.   They contain double bonds
  • C.   They contain ionic bonds
  • D.   They burn in oxygen

2. 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

Q3-4: Decane (C10H22) can be split into propene (C3H6) and heptane (C7H16) by cracking.

  
3. Which of these compounds are saturated?
  • A.   C10H22 only
  • B.   C3H6 only
  • C.   C10H22  and C7H16
  • D.   all three
4. These 3 molecules can all be described as ..
  • A.   alkanes
  • B.   alkenes
  • C.   monomers
  • D.   hydrocarbons

Q5-6 Ethene can react with many substances and can be used to make polymers.

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

  

ethene bromine reaction

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

ethene_polymer_x4

 

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
8. Which of the following are true of polymers?
  1. Most polymers are biodegradable
  2. Toxic gases are produced when polymers are disposed of by burning
  3. Polymers need to be sorted before melting and remoulding
  • A.   1 only
  • B.   2 and 3 only
  • C.   3 only
  • D.   1, 2 and 3

9. 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

Q10 – 11 Ethanol is present in alcoholic drinks and is produced by the fermentation of carbohydrates such as glucose.

  

10. 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
11. The products formed in the fermentation of glucose are ethanol and…..
  • A.   carbon dioxide
  • B.   oxygen
  • C.   hydrogen
  • D.   water