JAMB Chemistry 2008 Objective — Question 40
Question 40 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2008 Objective paper, with the correct answer and a full explanation.
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If the silver mirror test is positive, it indicates the presence of an
- A. alkyne
- B. alkanone
- C. alkanalCorrect
- D. alkanol
Explanation
The silver mirror test is conducted with Tollen's reagent, which is a mild oxidizing agent. It is used to distinguish alkanals from alkanones. Since alkanals have oxidizable hydrogen (attached to the carbonyl functional group), they react with Tollen's reagent while alkanones do not react with it since they have no oxidizable hydrogen.
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