1. Which statement best describes addition polymerisation?

a) Unsaturated monomers add together to form a polymer as the only product
b) Monomers join and always produce water as a by-product
c) Ions in solution combine to form a salt lattice
d) Small molecules break apart into even smaller fragments

2. Monomers for addition polymerisation are typically…

a) Alkanes (single C–C bonds only)
b) Alkenes with a C=C double bond
c) Alcohols
d) Carboxylic acids

3. Which representation shows the formation of poly(ethene)?

a) n CH₄ → (CH₄)_n
b) n CH₂=CH₂ → —[CH₂–CH₂]—_n
c) HO–(CH₂)_n–OH + n HOOC–R → polyester + n H₂O
d) C₂H₆ → C₂H₄ + H₂

4. The small molecules that join to form an addition polymer are , that is they contain a carbon carbon double covalent bond (C=C).

5. Polymers are large or molecules made when lots of small molecules called add or link together.

6. What happens to the C=C double bond during addition polymerisation?

a) It opens and forms new C–C single bonds in the chain
b) It remains unchanged in every repeat unit
c) It changes into a triple bond
d) It is removed as ethene gas

7. Why are many addition polymers described as having a “carbon backbone”?

a) Their main chain alternates C and O atoms
b) Their main chain consists mostly of C–C single bonds
c) They contain only carbon and hydrogen side groups
d) They are formed from carbon monoxide

8. Which statement about products in addition polymerisation is correct?

a) Water is always produced
b) Hydrogen chloride is the usual by-product
c) No other products form; only the polymer is produced
d) Carbon dioxide is released in large amounts

9. The monomer used to make poly(ethene) is .

10. Which statement about addition polymerisation is NOT correct?

a) The polymer backbone contains C=C double bonds throughout
b) It can be started by initiators
c) Monomers are usually unsaturated molecules
d) The repeat unit is shown in brackets with an n