Which pair of alcohols are isomers of each other?
A butan-1-ol and 2,2-dimethylpropan-1-ol
B butan-2-ol and 2-methylpropan-2-ol
C pentan-1-ol and 2-methylpropan-2-ol
D propan-2-ol and 2-methylpropan-2-ol - CIE - A-Level Chemistry - Question 21 - 2018 - Paper 1
Question 21
Which pair of alcohols are isomers of each other?
A butan-1-ol and 2,2-dimethylpropan-1-ol
B butan-2-ol and 2-methylpropan-2-ol
C pentan-1-ol and 2-methylpropan-2-o... show full transcript
Worked Solution & Example Answer:Which pair of alcohols are isomers of each other?
A butan-1-ol and 2,2-dimethylpropan-1-ol
B butan-2-ol and 2-methylpropan-2-ol
C pentan-1-ol and 2-methylpropan-2-ol
D propan-2-ol and 2-methylpropan-2-ol - CIE - A-Level Chemistry - Question 21 - 2018 - Paper 1
Step 1
A butan-1-ol and 2,2-dimethylpropan-1-ol
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Answer
Butan-1-ol (C4H10O) has a linear structure, while 2,2-dimethylpropan-1-ol (C5H12O) has a branched structure. They are not isomers.
Step 2
B butan-2-ol and 2-methylpropan-2-ol
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Answer
Butan-2-ol (C4H10O) is a secondary alcohol with the hydroxyl group on the second carbon, while 2-methylpropan-2-ol (C5H12O) is a tert-alcohol with the hydroxyl group on a carbon that is bonded to three other carbons. They differ in structure and are indeed isomers.
Step 3
C pentan-1-ol and 2-methylpropan-2-ol
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Answer
Pentan-1-ol (C5H12O) is a linear alcohol while 2-methylpropan-2-ol (C5H12O) is a branched alcohol. They are not isomers.
Step 4
D propan-2-ol and 2-methylpropan-2-ol
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Answer
Propan-2-ol (C3H8O) is a secondary alcohol, while 2-methylpropan-2-ol (C5H12O) is a tert-alcohol. These are not isomers.
