CBSE Class 12 Chemistry Alcohols Phenols And Ethers Worksheet Set 04

Official Class 12 Chemistry Worksheets: Unit 7 Alcohols, Phenols and Ethers

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Chapter-wise Practice Material: Unit 7 Alcohols, Phenols and Ethers

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QUESTION BANK
Alcohols, Phenols and Ethers
 
1. Give equations for the following:
 
(i) Catalytic hydration of alkenes
 
(ii) Hydroboration-Oxidation
 
(iii) Friedel-Craft’s reaction
 
(iv) Kolbe’s reaction
 
(v) Reimer – Tiemann Reaction.
 
(vi) Williamson’s synthesis
 
(vii) Acetylation
 
2. Account for the following:
 
(i) Bond angle in alcohol is less than tetrahedral angle.
 
(ii) Bond angle is greater than the tetrahedral angle.
 
(iii) The boiling points of alcohols and phenols are higher than corresponding alkanes of same molecular mass.
 
(iv) Among the isomeric alcohols the boiling point follows the order 3 0 < 2 0 < 1 0.
 
(v) Lower alcohols are soluble in water
 
(vi) Ethanol is less acidic than methanol.
 
(vii) The acidic character of the alcohols follows the order 1 0 > 2 0 > 3 0
 
(viii) The reaction of alcohol with acid is carried out in presence of small amount of concentrated H2SO4.
 
(ix) Reaction of alcohol with acid chloride is carried out in presence of a base pyridine.
 
(x) Ortho and para nitrophenols can be separated by steam distillation.
 
(xi) Phenol is ortho-para directive to electrophilic substitution.
 
(xii) The reaction of an alkoxide with a tertiary alkyl halide gives an alkene.
 
(xiii) Alkyl aryl ethers give phenol with HI instead of iodobenzene.
 
(xiv) Aralkyal ethers (or aryl alkyl ethers) are ortho para directing.
 
3. Effect the following conversions
 
(i) Chloro benzene to phenol
 
(ii) Benzene to phenol
 
(iii) Propene to 1-Propanol
 
(iv) Phenol to toluene
 
(v) Phenol to anisole
 
(vi) Phenol to aspirin
 
(vii) Propene to 2-propanol
 
(viii) Acetone to 30 butyl alcohol
 
(ix) Aniline to phenol
 
(x) Cumene to phenol
 
(xi) Ethanol to isopropyl alcohol
 
(xii) Phenol to picric acid
 
4. Explain Lucas test by taking suitable examples
 
5. Write equation for the following
 
(i) Mononitration of 3-methyl phenol
 
(ii) Trinitration of phenol
 
(iii) Methyl magnesium bromide is treated with butanone followed by hydrolysis
 
(iv) Methyl magnesium bromide is treated with propanal followed by hydrolysis
 
(v) Ethoxy benzene is treated with HI
 
(vi) Mononitration of anisole
 
6. Explain the following mechanisms
 
(i) Hydration of ethane
 
(ii) Dehydration of ethanol to form ethene
 
(iii) Dehydration of ethanol to form ethoxy ethane
 
7. Explain the manufacture of
 
(i) Methanol
 
(ii) Ethanol
 
8. Using suitable Grignard reagent prepare the following
 
(i) tert-pentyl alcohol
 
(ii) isobutyl alcohol
 
(iii) sec-pentyl alcohol
 
(iv) neopentyl alcoho

 

Please click on below link to download CBSE Class 12 Chemistry Alcohols Phenols And Ethers Worksheet Set D

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Exam Preparation Worksheet for Class 12 Chemistry Unit 7 Alcohols, Phenols and Ethers

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