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Question

The compound C6H5−CH=CH−COOH may be called as:

A
succinic acid
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B
3-phenylprop-2-en-1-oic acid
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C
mandelic acid
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D
cinnamic acid
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Solution

The correct options are
B 3-phenylprop-2-en-1-oic acid
D cinnamic acid
The given compound can be called as 3-phenylprop-2-en-1-oic acid and Cinnamic acid as well. The compound has the parent chain consisting of four Carbon atoms. Position 1 has the carboxylic acid and the presence of a double bond in the 2 position gives the name 3-phenylprop-2-en-1-oic acid. The compound is also known as cinnamic acid, which is an α,β- unsaturated carboxylic acid.
Hence, option (B) and (D) are correct.

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