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What is the IUPAC name of CH3-CH2-CHO?

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Question: What is the IUPAC name of CH3-CH2-CHO?

Options:

  1. Ethanal
  2. Propanal
  3. Butanal
  4. Methanal

Correct Answer: Ethanal

Solution: 

The compound CH3-CH2-CHO is an aldehyde and is named ethanal.

What is the IUPAC name of CH3-CH2-CHO?

Practice Questions

Q1
What is the IUPAC name of CH3-CH2-CHO?
  1. Ethanal
  2. Propanal
  3. Butanal
  4. Methanal

Questions & Step-by-Step Solutions

What is the IUPAC name of CH3-CH2-CHO?
  • Step 1: Identify the structure of the compound CH3-CH2-CHO. It consists of a two-carbon chain (CH3-CH2) and a carbonyl group (CHO) at the end.
  • Step 2: Recognize that the presence of the carbonyl group (CHO) at the end of the chain indicates that this compound is an aldehyde.
  • Step 3: Count the number of carbon atoms in the longest chain. There are 2 carbon atoms in total.
  • Step 4: Use the IUPAC naming convention for aldehydes, which is to take the name of the longest carbon chain and add 'al' at the end.
  • Step 5: The longest chain has 2 carbon atoms, which is called 'ethane'. Therefore, the name becomes 'ethanal' when we add 'al' for the aldehyde.
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