Maleate acid ion is more stable than fumarate acid ion.

True

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False

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Both are equally stable

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non of the above

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Solution

The correct option is A True

Maleate acid ion is more stable than fumarate acid ion because it forms a stable ring structure due to intramolecular $H -$ bonding. However in Fumarate ion there is intermolecular H-bonding is present which is less stable than intramolecular $H -$ bonding.
Option A is correct.

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