Which of the following is a secondary alcohol?
A 2-methylbutan-1-ol
B 2-methylbutan-2-ol
C butan-1-ol
D butan-2-ol - Scottish Highers Chemistry - Question 13 - 2019
Question 13
Which of the following is a secondary alcohol?
A 2-methylbutan-1-ol
B 2-methylbutan-2-ol
C butan-1-ol
D butan-2-ol
Worked Solution & Example Answer:Which of the following is a secondary alcohol?
A 2-methylbutan-1-ol
B 2-methylbutan-2-ol
C butan-1-ol
D butan-2-ol - Scottish Highers Chemistry - Question 13 - 2019
Step 1
Identify Secondary Alcohols
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Answer
A secondary alcohol is defined as an alcohol where the hydroxyl group (-OH) is attached to a carbon atom that is itself connected to two other carbon atoms. To determine which option is a secondary alcohol, we need to analyze the provided options.
Step 2
Evaluate Each Option
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Answer
A: 2-methylbutan-1-ol - Here, the -OH group is on the first carbon, making this a primary alcohol. B: 2-methylbutan-2-ol - The -OH group is on a carbon that is connected to two other carbons (specifically, the second carbon in this case), which qualifies this as a secondary alcohol. C: butan-1-ol - The -OH group is on the first carbon, making this a primary alcohol. D: butan-2-ol - The -OH group is on a carbon that is connected to two other carbons, so this is also a secondary alcohol.
Step 3
Conclusion
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Answer
After reviewing the options, 2-methylbutan-2-ol (B) and butan-2-ol (D) are both secondary alcohols. However, based on the marking scheme, the correct answer is D: butan-2-ol, which is classified as a secondary alcohol.
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