Figure 1 shows the structure of a monomer, fluoroethene.

Which of these options represents the correct structure of a section of the addition polymer formed from this monomer?
A chain with single covalent bonds between carbon atoms, where alternating carbons have two hydrogen atoms, and the others have one hydrogen and one fluorine atom: −CH2−CHF−CH2−CHF−-\text{CH}_2-\text{CHF}-\text{CH}_2-\text{CHF}-−CH2−CHF−CH2−CHF−
A chain with double covalent bonds between carbon atoms: =CH2−CHF=CH2−CHF==\text{CH}_2-\text{CHF}=\text{CH}_2-\text{CHF}==CH2−CHF=CH2−CHF=
A chain with single covalent bonds where every carbon atom in the backbone is bonded to one hydrogen and one fluorine atom: −CHF−CHF−CHF−CHF−-\text{CHF}-\text{CHF}-\text{CHF}-\text{CHF}-−CHF−CHF−CHF−CHF−
A chain with single covalent bonds where all fluorine atoms have been lost: −CH2−CH2−CH2−CH2−-\text{CH}_2-\text{CH}_2-\text{CH}_2-\text{CH}_2-−CH2−CH2−CH2−CH2−
Practise Edexcel GCSE Chemistry Polymers with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.