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Published on: 22/01/2020
Hydroxy Compounds and Ethers
Download Tamil Nadu 12th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
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1.
Is it possible to oxidise t – butyl alcohol using acidified dichromate to form a carbonyl compound.
2.
Can we use nucelophiles such as NH3,CH3O - for the Nucleophilic substitution of alcohols
3.
Arrange the following in the increasing order of their boiling point and give a reason for your ordering
(i) Butan – 2- ol, Butan -1-ol, 2 –methylpropan -2-ol
(ii) Propan -1-ol, propan -1,2,3-triol, propan -1,3 – diol, propan -2-ol
4.
Predict the major product, when 2-methyl but -2-ene is converted into an alcohol in each of the following methods.
(i) Acid catalysed hydration
(ii) Hydroboration
(iii) Hydroxylation using Baeyer's reagent
5.
What is the major product obtained when two moles of ethyl magnesium bromide is treated with methyl benzoate followed by acid hydrolysis.
6.
Suggest a suitable reagent to prepare secondary alcohol with identical group using Grignard reagent.
7.
Draw the major product formed when 1-ethoxyprop-1-ene is heated with one equivalent of HI.
8.
Identify the product (s) is / are formed when 1 – methoxy propane is heated with excess HI. Name the mechanism involved in the reaction.
9.
Arrange the following in the decreasing order of order of acid strength.
10.
Which of the following does not give iodoform reaction?
11.
What happens when crotonaldehyde is reduced in the presence of LiAlH4?
12.
What happens when anisole is nitrated?
13.
Why sodium metal cannot be used to dry alcohols but it can be used to dry ethers?
14.
Identify the product A and B.
15.
Identify the product C and D.
1.
Tertiary alcohols do not undergo oxidation reaction under normal conditions, but at elevated temperature under strong oxidizing, agent cleavage of C-C-bond takes place to give a mixture of carboxylic acid.
2.
Yes, we can use nucleophiles such as NH3, CH3O- for the nucleophilic substitution of alcohol.
Example
\(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}+\mathrm{NH}_{3} \rightarrow \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}+\mathrm{H}_{2} \mathrm{O} \)
\(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}+\mathrm{CH}_{2} \mathrm{~N}_{2} \rightarrow \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OCH}_{3}+\mathrm{N}_{2}\)
3.
(i) 2-methyl propan-2-o1 < Butan-2-ol < Butan-1-ol
(ii) propan-2-ol < propan-1-ol < propan -1,3- diol < propan-1,2,3-triol
4.
(i) Acid catalysed hydration
(ii) Hydroboration
(iii) Hydroxylation using Baeyer's reagent
5.
6.
Acetaldehyde - CH3-CHO
7.
8.
Since 1 - methoxy propane has primary alkyl group, it under goes SN2 reaction.
9.
10.
Tertiary butyl alcohol does not give iodoform reaction. All other compounds contains α H atoms and they undergo iodoform reaction.
11.
12.
When anisole is treated with a mixture of cone. HNO3 and cone. H2SO4, it gives a mixture of ortho and para nitro anisole.
13.
Alcohols are acidic enough to react with sodium but ethers are inert.
14.
15.
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