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TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 2 Mark Questions with Solution Part - II

Published on: 21/06/2021

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Std: 12th Standard - Chemistry

chapter: - Creative Questions

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Questions:

Generic 2

5 x 2 = 10

Give chemical test to distinguish between methanol and phenol.

Explain why phenol does not undergo substitution of the -OH group like alcohol.

What happens when ethylene reacts with alkaline KMnO₄ solution?

Explain 'esterification' reaction with an example.

How will you convert C₂H₅OH to C₂H₅OC₂H₅?

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Answers Key:

Generic 2

5 x 2 = 10

(i) Methanol do not have any effect on litmus paper whereas phenol turns blue litmus red.
(ii) Methanol do not give any colour with neutral FeCl₃ solution, whereas an aqueous solution of phenol gives violent colour with neutral FeCl₃ solution.

In phenol the electron density is increased in the benzene ring and hence the benzene ring is activated towards electrophilic substitution reaction and -OH group does not undergo substitution reaction like alcohol.

When ethylene reacts with alkaline KMnO₄ solution (Baeyer's reagent), it forms glycol (diol).

Alcohols react with carboxylic acids in the presence of an acid to give esters.

When C₂H₅OH (Ethanol) is treated with cone H₂SO₄ at 410 K, intermolecular dehydration take place and the product formed will be diethyl ether C₂H₅-O-C₂H₅.