Ethanol on reaction of acidified potassium dichromate form:

ethane

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ethene

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ethanal

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ethanoic acid

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Solution

The correct option is D ethanoic acid
$C_{2} H_{5} O H + K_{2} C r_{2} O_{7} / H^{+} \to C H_{3} C H O \to C H_{3} C O O H$
Ethanol is first oxidised to ethanal and then to ethanoic acid.
Potassium dichromate is a very strong oxidising agent, ethanol on oxidation, the dichromate ion (IV) solution which is orange in colour is reduced to a green colour Cr(III) ion solution. This reaction is used in detecting the presence of alcohol in breath in suspected drunken drivers.

Hence, the correct option is D.

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Similar questions

Q. When ethanol is converted to ethanoic acid by using acidified potassium dichromate, the ethanol is:

Q. The compound formed when ethanol is treated with acidified potassium dichromate

(K_{2} C r_{2} O_{7}

) is.

What happens when (Give equations of the chemical reaction)
(i) A pinch of sodium hydrogencarbonate is added to ethanoic acid.
(ii) Ethanol is oxidised with acidified potassium dichromate.

What happens when: (Write chemical reactions as well)
(i) A pinch of sodium hydrogen carbonate is added to ethanoic acid.
(ii) Ethanol is oxidised with acidified potassium dichromate.

The products formed when $S O_{2}$ reacts with acidified potassium dichromate solution is :

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