Which of the following compounds can exhibit tautomeric isomerism?

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Question: Which of the following compounds can exhibit tautomeric isomerism?

Options:

Correct Answer: Acetic acid

Solution:

Acetic acid can exist in two forms (keto and enol) and thus exhibits tautomeric isomerism.

Which of the following compounds can exhibit tautomeric isomerism?

Which of the following compounds can exhibit tautomeric isomerism?

Step 1: Understand what tautomeric isomerism is. It is when a compound can exist in two different forms that can easily convert into each other.
Step 2: Identify the types of forms involved in tautomeric isomerism. Typically, these are keto (carbonyl) and enol (alcohol) forms.
Step 3: Look at the compound in question, which is acetic acid (CH3COOH).
Step 4: Determine if acetic acid can exist in both keto and enol forms. Acetic acid can exist as a keto form (the original structure) and an enol form (where the double bond and hydroxyl group are rearranged).
Step 5: Conclude that since acetic acid can exist in both forms, it exhibits tautomeric isomerism.

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