Which statement is correct about both 2-methylbutan-1-ol and 2-methylbutan-2-ol?
A They can be formed by alkaline hydrolysis of esters - AQA - A-Level Chemistry - Question 11 - 2018 - Paper 3
Question 11
Which statement is correct about both 2-methylbutan-1-ol and 2-methylbutan-2-ol?
A They can be formed by alkaline hydrolysis of esters.
B They can be oxidised by... show full transcript
Worked Solution & Example Answer:Which statement is correct about both 2-methylbutan-1-ol and 2-methylbutan-2-ol?
A They can be formed by alkaline hydrolysis of esters - AQA - A-Level Chemistry - Question 11 - 2018 - Paper 3
Step 1
A They can be formed by alkaline hydrolysis of esters.
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Answer
This statement is incorrect. Alkaline hydrolysis of esters typically yields carboxylate salts and alcohols, but does not specifically yield 2-methylbutan-1-ol or 2-methylbutan-2-ol.
Step 2
B They can be oxidised by reaction with acidified potassium dichromate(VI).
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Answer
This statement is also incorrect. 2-methylbutan-1-ol is a primary alcohol and can be oxidized to an aldehyde, while 2-methylbutan-2-ol is a secondary alcohol and can be oxidized to a ketone. Thus, oxidation occurs but not for both alcohols to yield the same product.
Step 3
C They can be formed by hydration of 2-methylbut-2-ene.
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Answer
This statement is correct. Both 2-methylbutan-1-ol and 2-methylbutan-2-ol can indeed be formed by the hydration process of 2-methylbut-2-ene under acid catalysis.
Step 4
D They have four peaks in their 13C NMR spectra.
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Answer
This statement is incorrect. The number of peaks in a 13C NMR spectrum corresponds to the number of distinct carbon environments in a molecule. Both 2-methylbutan-1-ol and 2-methylbutan-2-ol do not necessarily exhibit four distinct peaks due to their structural similarities.
