Which compound reacts with warm dilute aqueous sodium hydroxide?
A - AQA - A-Level Chemistry - Question 31 - 2021 - Paper 3
Question 31
Which compound reacts with warm dilute aqueous sodium hydroxide?
A. C4H6
B. CH2=CH-CH2
C. CH3CH2CH-NH2
D. (CH3CO)2O
Worked Solution & Example Answer:Which compound reacts with warm dilute aqueous sodium hydroxide?
A - AQA - A-Level Chemistry - Question 31 - 2021 - Paper 3
Identify the compounds
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The question provides four compounds:
- A. C4H6
- B. CH2=CH-CH2
- C. CH3CH2CH-NH2
- D. (CH3CO)2O
We need to determine which of these compounds reacts with warm dilute aqueous sodium hydroxide.
Analyze the reactivity
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Warm dilute sodium hydroxide typically reacts with esters and compounds that can undergo hydrolysis.
In the options:
- Compound A (C4H6) is a diene and not likely to react.
- Compound B (CH2=CH-CH2) is an alkene and may not react significantly.
- Compound C (CH3CH2CH-NH2) is an amine, which may have limited reactivity with sodium hydroxide.
- Compound D, (CH3CO)2O, is an ester (specifically acetic anhydride), which is known to react with sodium hydroxide.
Select the correct compound
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Given the analysis, the compound that reacts with warm dilute aqueous sodium hydroxide is:
D. (CH3CO)2O (acetic anhydride)
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