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Which statement about HOCH₂CH(NH₂)COOH is correct? A - AQA - A-Level Chemistry - Question 33 - 2022 - Paper 3
Question 33
Which statement about HOCH₂CH(NH₂)COOH is correct? A. It decolourises bromine water. B. It is a component of DNA. C. It is insoluble in water. D. It reacts with ... show full transcript
Worked Solution & Example Answer:Which statement about HOCH₂CH(NH₂)COOH is correct? A - AQA - A-Level Chemistry - Question 33 - 2022 - Paper 3
Step 1
D. It reacts with hydrochloric acid.
Answer
The correct statement about HOCH₂CH(NH₂)COOH is that it reacts with hydrochloric acid. This compound is an amino acid (specifically, an alpha-amino acid), and amino acids typically contain a carboxyl group (-COOH) that can react with acids such as hydrochloric acid (HCl).
- Explanation: The carboxyl group can donate a proton (H⁺) in acidic conditions, making the compound more acidic. Thus, statement D is true, while the other statements do not accurately describe the compound.