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Chemistry µGCSE:

More Organic

10 quick questions - for GCSE and iGCSE

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10 minutes maximum! (can you do it in 5?)  

1. The structure for ethanol is:

organic molecules x4

 

Q2-3: Ethanol can be produced by the reaction between ethene and steam.


2. The ethene is obtained from crude oil as shown:

  process 1   process 2  
CRUDE OIL  arrow LONG CHAIN FRACTIONS arrow ETHENE

Processes 1 and 2 are …

  Process 1 Process 2
A Fractional distillation polymerisation
B fermentation polymerisation
C Fractional distillation cracking
D fermentation cracking

 

3. The reaction between ethene and steam is a(n)  reaction.


Q4-6: Sugars such as glucose (C6H12O6) can be converted into ethanol by fermentation
.


4. The conditions required for this reaction to take place are …

  Substance added Temperature (oC)
A yeast 30
B acid catalyst 100
C yeast 100
D acid catalyst 30
5. The other product in this reaction is a gas which ….
  • A.   pops with a lighted splint
  • B.   turns limewater milky
  • C.   relights a glowing splint
  • D.   turns damp UI paper blue

 

6. A concentrated solution of ethanol is obtained from the reaction mixture by …
  • A.   evaporation
  • B.   filtration
  • C.   chromatography
  • D.   fractional distillation

7+8. Ethanol is very useful as a fuel.

 

burning ethanol

Ethanol
SirVir | CC 3.0

7. The balanced equation for the complete combustion of ethanol is…
  • A.   2 C2H5OH  +  3 O2     4 CO2 + 6 H2
  • B.   C2H5OH  +  3 O2     2 CO2 + 3 H2O
  • C.   2 C2H5OH  +  O2     4 CO + 6 H2
  • D.   C2H5OH  +  2 O2     2 CO + 3 H2O
8. Another use of ethanol is as a …
  • A.   solvent
  • B.   monomer
  • C.  glue
  • D.   flavouring

Q9-10: Polymers can be either addition polymers or condensation polymers.

 

9. The monomers used for condensation polymers MUST contain …

  • A.   a double C=C bond
  • B.   two functional groups
  • C.   oxygen atoms
  • D.   at least four carbon atoms

10. Polythene and nylon are both polymers. Select the correct type of polymer.

  polythene Nylon
A condensation condensation
B condensation addition
C addition condensation
D addition addition