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Which of the following alkynes is symmetrical?

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Question: Which of the following alkynes is symmetrical?

Options:

  1. 1-butyne
  2. 2-butyne
  3. 1-pentyne
  4. 3-pentyne

Correct Answer: 2-butyne

Solution: 

2-butyne is a symmetrical alkyne.

Which of the following alkynes is symmetrical?

Practice Questions

Q1
Which of the following alkynes is symmetrical?
  1. 1-butyne
  2. 2-butyne
  3. 1-pentyne
  4. 3-pentyne

Questions & Step-by-Step Solutions

Which of the following alkynes is symmetrical?
Correct Answer: 2-butyne
  • Step 1: Understand what an alkyne is. Alkynes are hydrocarbons that contain at least one triple bond between carbon atoms.
  • Step 2: Know what a symmetrical alkyne is. A symmetrical alkyne has the same groups or atoms on both sides of the triple bond.
  • Step 3: Look at the structure of 2-butyne. It has the formula C4H6 and its structure is CH3-C≡C-CH3.
  • Step 4: Analyze the structure of 2-butyne. Both sides of the triple bond (C≡C) have the same groups (CH3) attached.
  • Step 5: Conclude that since both sides are identical, 2-butyne is a symmetrical alkyne.
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