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.
This question appeared on the UHS MDCAT 2008 paper, which you can sit online with every answer explained.
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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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679 free Aldehydes and Ketones MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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