Photo AI
Which type of polymer is not hydrolysed by heating with concentrated aqueous sodium hydroxide? A poly(alkene) B poly(amide) C poly(ester) D protein - AQA - A-Level Chemistry - Question 34 - 2021 - Paper 3
Question 34
Which type of polymer is not hydrolysed by heating with concentrated aqueous sodium hydroxide? A poly(alkene) B poly(amide) C poly(ester) D protein
Worked Solution & Example Answer:Which type of polymer is not hydrolysed by heating with concentrated aqueous sodium hydroxide? A poly(alkene) B poly(amide) C poly(ester) D protein - AQA - A-Level Chemistry - Question 34 - 2021 - Paper 3
Step 1
Identify the polymers and their properties
Answer
In this question, we need to identify which type of polymer does not undergo hydrolysis when treated with concentrated aqueous sodium hydroxide. The options are:
- Poly(alkene): These polymers are formed from alkenes and typically do not hydrolyse in alkaline conditions.
- Poly(amide): This type of polymer can be hydrolysed in the presence of alkali, breaking the amide bonds.
- Poly(ester): Polyesters can also be hydrolysed by alkalis.
- Protein: Proteins are made of amino acids linked by peptide bonds, which can be hydrolysed under these conditions.
Thus, poly(alkene) is the only type not hydrolysed.
Step 2