Antiseptic Urotropine formed by ____________?
Correct answer: C. Formaldehyde
- A. Carboxylic acid
- B. Acetaldehyde
- C. Formaldehyde
- D. Ketone
Explanation
Urotropine, or hexamethylenetetramine, is formed by the condensation of formaldehyde with ammonia: 6HCHO + 4NH3 → (CH2)6N4 + 6H2O. Formaldehyde is the aldehyde that supplies the methylene units in this reaction. Option b is a likely mistake because acetaldehyde is also an aldehyde, but it is not used for making urotropine.
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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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