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Which of the following compounds is a primary alcohol?

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Question: Which of the following compounds is a primary alcohol?

Options:

  1. CH3CH2OH
  2. CH3CHO
  3. CH3CH2CH2OH
  4. C6H5CH2OH

Correct Answer: CH3CH2OH

Solution: 

A primary alcohol is one where the hydroxyl group (-OH) is attached to a carbon that is only connected to one other carbon. CH3CH2OH (ethanol) is a primary alcohol.

Which of the following compounds is a primary alcohol?

Practice Questions

Q1
Which of the following compounds is a primary alcohol?
  1. CH3CH2OH
  2. CH3CHO
  3. CH3CH2CH2OH
  4. C6H5CH2OH

Questions & Step-by-Step Solutions

Which of the following compounds is a primary alcohol?
  • Step 1: Understand what a primary alcohol is. A primary alcohol has a hydroxyl group (-OH) attached to a carbon atom that is connected to only one other carbon atom.
  • Step 2: Look at the structure of the compound CH3CH2OH (ethanol).
  • Step 3: Identify the carbon atom that has the -OH group attached to it. In ethanol, this is the second carbon.
  • Step 4: Check how many carbon atoms are connected to the carbon with the -OH group. In ethanol, this carbon is connected to only one other carbon.
  • Step 5: Since the carbon with the -OH group is connected to only one other carbon, ethanol is classified as a primary alcohol.
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