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Reagents which can be used to convert alcohols to carboxylic acids, are (A) $CrO_3-H_2SO_4$ (B) $K_2Cr_2O_7+H_2SO_4$ (C) $KMnO_4+KOH/H_3O^+$ (D) Cu, 573 K (E) $CrO_3, (CH_3CO)_2O$. Choose the most appropriate answer from the options given below:
A
(B), (C) and (D) only
B
(B), (D) and (E) only
C
(A), (B) and (C) only
D
(A), (B) and (E) only
Detailed Solution
Strong oxidising agents such as $CrO_3-H_2SO_4$ (A), $K_2Cr_2O_7-H_2SO_4$ (B), and $KMnO_4+KOH/H_3O^+$ (C) can oxidise a primary alcohol all the way to a carboxylic acid. (D) Cu at 573 K only dehydrogenates the alcohol to an aldehyde, and (E) $CrO_3$ with acetic anhydride (Collins-type reagent, Sarrett's reagent variant) typically stops oxidation at the aldehyde stage.