3. Which of the following is a hemiacetal? A) CH³. CH CH CH B) OCH,CH3 CH3-C-H OH OCH3 C) HOCH,CHCH,CH3 D)

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A:

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A:

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A:

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A:

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A: Correct Option :    B)  CH3CH2CH2-N+H2-CH2CH2CH2CH2CH2CH3              +    Cl-

Diol

In chemistry there are so many chemical compounds that have a hydroxyl group but a chemical compound having two hydroxyl groups (-OH) is termed as a diol. It also implies the presence of two alcohols whereas polyols contain two or more than two hydroxyl groups (-OH). Glycol or 1,2-diol is an aliphatic diol that has two alcohol groups on adjacent carbon atoms. In industries, the most commonly used diol is ethylene glycol.