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Which of the following is the correct structure for 2-methylpropane?

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Question: Which of the following is the correct structure for 2-methylpropane?

Options:

  1. CH3-CH(CH3)-CH2-CH3
  2. CH3-CH2-CH(CH3)-CH3
  3. CH3-CH(CH3)-CH(CH3)-CH3
  4. CH3-CH2-CH2-CH(CH3)

Correct Answer: CH3-CH2-CH(CH3)-CH3

Solution: 

2-methylpropane has a branched structure with a methyl group on the second carbon.

Which of the following is the correct structure for 2-methylpropane?

Practice Questions

Q1
Which of the following is the correct structure for 2-methylpropane?
  1. CH3-CH(CH3)-CH2-CH3
  2. CH3-CH2-CH(CH3)-CH3
  3. CH3-CH(CH3)-CH(CH3)-CH3
  4. CH3-CH2-CH2-CH(CH3)

Questions & Step-by-Step Solutions

Which of the following is the correct structure for 2-methylpropane?
Correct Answer: C5H12
  • Step 1: Understand that 2-methylpropane is a type of hydrocarbon called an alkane.
  • Step 2: Know that alkanes have a general formula of CnH2n+2, where n is the number of carbon atoms.
  • Step 3: Identify that 'propane' means there are 3 carbon atoms in the main chain.
  • Step 4: Recognize that '2-methyl' indicates there is a methyl group (CH3) attached to the second carbon of the main chain.
  • Step 5: Draw the main chain of 3 carbon atoms (C-C-C) for propane.
  • Step 6: Add a methyl group (CH3) to the second carbon of the main chain.
  • Step 7: Ensure that all carbon atoms have enough hydrogen atoms to satisfy their four bonds.
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