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Which one of the following is the semi-structural formula of 2-methylpent-1-ene? A - VCE - SSCE Chemistry - Question 23 - 2023 - Paper 1
Question 23
Which one of the following is the semi-structural formula of 2-methylpent-1-ene? A. (CH₃)₂C(CH₂)₃CH₃ B. (CH₃)₃CH(CH₂)₂CH₃ C. CH₃C(CH₃)CH₂CH₂CH₃ D. CH₂(CH)(CH₃)₂CH₃
Worked Solution & Example Answer:Which one of the following is the semi-structural formula of 2-methylpent-1-ene? A - VCE - SSCE Chemistry - Question 23 - 2023 - Paper 1
Step 1
Identify the correct option for 2-methylpent-1-ene
Answer
The correct semi-structural formula for 2-methylpent-1-ene is option C: CH₃C(CH₃)CH₂CH₂CH₃.
To understand this, we first determine the structure of 2-methylpent-1-ene:
- "Pent" indicates a five-carbon chain.
- The "1-ene" indicates that the double bond starts at the first carbon in the chain.
- "2-methyl" indicates a methyl group (–CH₃) attached to the second carbon in the chain.
By examining each option, we see:
- Option A represents a different arrangement.
- Option B also corresponds to a different structure.
- Option D does not accurately reflect the double bond position.
Therefore, option C is the correct representation.