Allene, C₃H₄ (Shown Below), Is One Component of Gas Used

question 30

Multiple Choice

Allene, C₃H₄ (shown below) , is one component of gas used for high-temperature welding. According to the valence bond model, which is a proper description of the bonding on the central carbon atom in allene?

• A) It shares four bonds, two with each carbon atom on either side.
• B) It shares four σ bonds, two with each carbon atom on either side.
• C) It shares one σ bond and one bond with each carbon atom on either side.
• D) It shares two σ bonds with the carbon atom on the left, and two bonds with the carbon atom on the right.
• E) It shares two σ bonds with the carbon atom on the right, and two bonds with the carbon atom on the left.

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