(a) What happens when ethanol is oxidised with alkaline potassium permanganate (or acidified potassium dichromate)? Write the equation of the reaction involved.
(b) Choose those compounds from the following which can turn blue litmus solution red :
$H C H O, C H_{3} C O O H, C H_{3} O H, C_{2} H_{5} O H, H C O O H, C H_{3} C H O$
Give reasons for your choice.

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Solution

(a) When ethanol reacts with alkaline potassium permanganate or acidified potassium dichromate, ethanoic acid is formed because they are strong oxidising agents.The chemical equation is:

$C H_{3} C H_{2} O H$ + 2[O] $\Rightarrow$ $C H_{3} C O O H$ + $H_{2} O$

(b) $C H_{3} C O O H$ and $H C O O H$ will turn blue litmus red because it is acidic in nature.

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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.

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.

(a) In organic compounds, which part largely determines the physical and chemical properties.
(b) Write chemical equation to represent the reaction of ethanol with acidified solution of potassium dichromate.

Q. When ethanol is heated with alkaline potassium permanganate solution, it gets converted into ethanoic acid. In this reaction, alkaline potassium permanganate acts as:

(a) reducing agent
(b) oxidising agent
(c) catalyst
(d) dehydrating agent

Q. An organic compound A of molecular formula C₂H₆O is a constituent of wine and beer. This compound on heating with alkaline potassium permanganate forms another organic compound B which turns blue litmus to red. Identify the compounds A and B.

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