Styrene can be obtained by decarboxylation of:

Phenylacetic acid

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Phthalic acid

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Cinnamic acid

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Fumaric acid

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Solution

The correct option is C Cinnamic acid
Decarboxylation reaction is defined as a chemical reaction that eliminates a carboxyl group and liberates carbon dioxide $(C O_{2})$ . Decarboxylation mostly refers to a reaction of carboxylic acids erasing a carbon atom from a chain of carbons. The reagents used in the reaction are $N a O H$ and $C a O$ in $3 : 1$ ratio in presence of heat.

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