Selected MCQ

Current Question
Which reagent reduces aldehydes to alcohols?
  • A. KMnO₄
  • B. NaBH₄
  • C. HCl
  • D. PCC
Correct Answer: B
Explanation:
Sodium borohydride reduces aldehydes.
Related Question 1
Which reagent most directly distinguishes aldehydes from ketones under mild conditions?
  • A. Bromine water
  • B. Tollens’ reagent
  • C. Dilute HCl
  • D. Sodium chloride
Correct Answer: B
Explanation:
Aldehydes reduce Tollens’ reagent whereas ordinary ketones generally do not.
Related Question 2
Which reagent oxidizes alcohol to aldehyde?
  • A. KMnO₄
  • B. PCC
  • C. NaOH
  • D. HCl
Correct Answer: B
Explanation:
PCC stops oxidation at aldehyde stage.