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  • {CH}_{3} {CH}_{2} {OH} can be converted into {CH}_{3} {CHO} by ______________. (i) catalytic hydrogenation (ii) treatment with {LiAIH}_{4} (iii) treatment with pyridinium chlorochromate (iv) treatment with {KMnO}_{4}

\text {CH}_{3}\text {CH}_{2}\text {OH} can be converted into \text {CH}_{3}\text {CHO} by ______________.

(i) catalytic hydrogenation

(ii) treatment with \text {LiAIH}_{4}

(iii) treatment with pyridinium chlorochromate

(iv) treatment with \text {KMnO}_{4}

Answers (1)

The answer is the option (iii). The compound  \text {CH}_{3}\text {CH}_{2}\text {OH} oxidises and forms \text {CH}_{3}\text {CHO} as the end product. In the oxidation reaction process, the addition of pyridinium chlorochromate, a strong oxidising agent, breaks the cycle by forming aldehydes and preventing complete oxidation of \text {CH}_{3}\text {CH}_{2}\text {OH}. As the reaction is halted at the aldehyde stage, the end product formed is \text {CH}_{3}\text {CHO}.

So \text {CH}_{3}\text {CH}_{2}\text {OH} can be converted into \text {CH}_{3}\text {CHO} by option (iii) treatment with pyridinium chlorochromate

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