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Strong and Weak Acids and Bases

Which of foll...

Question

Which of following acid remains unaffected on heating?

A

Malonic acid

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B

Maleic acid

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C

Fumaric acid

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D

Succinic acid

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Solution

The correct option is C Fumaric acid
It remains unaffected upon heating because the trans double present in the compound at the $α$ position of $- C O O H$ group prevents many reactions performed by carboxylic acids. When melted it does isomerize and form maleic anhydride. Few materials are completely immune to heat.

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