Which compound can form a polymer without needing another reagent?
A HOCH₂CH₂OH
B HOOCCH₂CH₂COOH
C HOCH₂CH₂COCl
D ClCH₂CH₂COOH - AQA - A-Level Chemistry - Question 25 - 2017 - Paper 3
Question 25
Which compound can form a polymer without needing another reagent?
A HOCH₂CH₂OH
B HOOCCH₂CH₂COOH
C HOCH₂CH₂COCl
D ClCH₂CH₂COOH
Worked Solution & Example Answer:Which compound can form a polymer without needing another reagent?
A HOCH₂CH₂OH
B HOOCCH₂CH₂COOH
C HOCH₂CH₂COCl
D ClCH₂CH₂COOH - AQA - A-Level Chemistry - Question 25 - 2017 - Paper 3
Step 1
Identify the compounds
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Answer
The four options provided are:
HOCH₂CH₂OH: This is ethylene glycol which contains hydroxyl groups.
HOOCCH₂CH₂COOH: This is a dicarboxylic acid, specifically malonic acid.
HOCH₂CH₂COCl: This is a chloro compound with a hydroxyl and a chlorine functional group.
ClCH₂CH₂COOH: This compound has a chlorine and a carboxylic acid functional group.
Step 2
Determine which compound can form a polymer
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Answer
A polymer can form through the reaction of monomer units. Among the listed compounds, HOCH₂CH₂COCl (C) can react with itself through its reactive chlorine atom to form a polymer without needing another reagent.
