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Which reagent converts toluene to benzaldehyde in the Etard reaction?
AAcidified potassium dichromate
BAlkaline potassium permanganate
CChromyl chloride, CrO2Cl2
DConcentrated nitric acid
Answer & Solution
Correct answer: C. Chromyl chloride, CrO2Cl2
Chromyl chloride oxidises the methyl group to a chromium complex that hydrolyses to the aldehyde and so stops short of benzoic acid.
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