IUPAC name of hydroxy butyraldehyde is:

1-hydroxybutanal

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2-hydroxybutanol

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2-Hydroxybutanal

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2-hydroxybutyraldehyde

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Solution

The correct option is A 2-Hydroxybutanal
In a hydroxybutyraldehyde, the parent carbon atom is butane and one aldehyde group is present. It is represented as butanal.

Aldehyde has higher priority than alcohol functional group.

Also one hydroxyl group at second (or alpha) carbon atom is present.

Hence, the IUPAC name of a hydroxybutyraldehyde is 2-Hydroxy butanal.

Option C is correct.

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