Which of the following is used to make chloral hydrate?
Correct answer: A. Acetaldehyde.
- A. Acetaldehyde.
- B. Formaldehyde.
- C. None of these.
- D. Both A and B.
Explanation
Chloral is produced by chlorinating acetaldehyde or ethanol in an acidic solution by gradually increasing the temperature from 0 °C to 90 °C.
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About Preparation of Aldehydes and Ketones
Aldehydes and ketones are prepared mainly by controlled oxidation or dehydrogenation of primary and secondary alcohols, respectively. The topic also includes ozonolysis of alkenes, hydration of alkynes and preparation through acyl derivatives, with attention to why primary alcohols can give aldehydes whereas secondary alcohols give ketones.
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