Q9 of 27 Page 1

Write the mechanism of acid dehydration of ethanol to yield ethane

Step 1: Formation of protonated alcohol



Step 2: Formation of Carbocation



Step 3: Formation of ethene by the loss of a proton.



Explanation:



This mechanism is a mechanism for the dehydration of alcohols. Alcohols undergo dehydration which is the removal of a molecule of water to form alkenes in the presence of acids like concentrated sulphuric acid.



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(a)


(b)


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(a) Justify the role of tert - butyl peroxide in the polymerization of ethene.

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For a certain chemical reaction variation in concentration [A] vs. time (s) plot is given below:

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