This question is about carboxylic acids and polymers.

1. (a)The structure of an organic compound is shown. [Figure 7.1 - Dicarboxylic acid structure] Deduce the molecular formula of this compound.[1]
2. (b)Propanoic acid, C2H5COOH, reacts with methanol, CH3OH, to form an ester.
3. (b)(i)Name this ester. Draw the structure of this ester showing all atoms and all bonds. name of ester structure of ester[2]
4. (b)(ii)State one use of esters.[1]
5. (c)Ethanoic acid can be produced by the bacterial oxidation of ethanol. Give one other method of oxidising ethanol to produce ethanoic acid.[2]
6. (d)The simplified structures of a dicarboxylic acid monomer and a diamine monomer are shown. [Figure 7.2 - Monomer structures]
7. (d)(i)Draw the partial structure of the condensation polymer formed from these two monomers to show: • two repeat units • all of the atoms and all of the bonds in the amide linkages.[2]
8. (d)(ii)State the meaning of the term condensation in condensation polymerisation.[1]
9. (e)Proteins have amide linkages. Proteins are hydrolysed using dilute acid. Name the type of compound produced by this hydrolysis.[1]

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