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.
Correct Answer:
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