Which statement is not correct for both primary and secondary alcohols?
A) They are easily oxidised to carboxylic acids by acidified K₂Cr₂O₇ solution - AQA - A-Level Chemistry - Question 24 - 2022 - Paper 3
Question 24
Which statement is not correct for both primary and secondary alcohols?
A) They are easily oxidised to carboxylic acids by acidified K₂Cr₂O₇ solution.
B) They can ... show full transcript
Worked Solution & Example Answer:Which statement is not correct for both primary and secondary alcohols?
A) They are easily oxidised to carboxylic acids by acidified K₂Cr₂O₇ solution - AQA - A-Level Chemistry - Question 24 - 2022 - Paper 3
Step 1
A) They are easily oxidised to carboxylic acids by acidified K₂Cr₂O₇ solution.
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Answer
This statement is incorrect for secondary alcohols. While primary alcohols can easily be oxidized to carboxylic acids using acidified potassium dichromate (K₂Cr₂O₇), secondary alcohols typically oxidize to ketones instead, not carboxylic acids.
Step 2
B) They can be formed from bromoalkanes by hydrolysis.
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Answer
This statement is correct. Both primary and secondary alcohols can be synthesized from bromoalkanes through hydrolysis, which involves the substitution of the bromine atom by a hydroxyl group.
Step 3
C) They form esters with carboxylic acids.
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Answer
This statement is correct as well. Alcohols react with carboxylic acids in a condensation reaction to form esters, irrespective of whether they are primary or secondary.
Step 4
D) They show hydrogen bonding in the liquid state.
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Answer
This statement is also correct. Both primary and secondary alcohols can form hydrogen bonds due to the presence of hydroxyl (–OH) groups, which contributes to their relatively high boiling points and solubility in water.
