CBSE Class 12 Chemistry Alcohols Phenols And Ethers Worksheet Set B

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Unit 11 Alcohols, Phenols and Ethers Chemistry Worksheet for Class 12

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Class 12 Chemistry Unit 11 Alcohols, Phenols and Ethers Worksheet Pdf

ALCOHOLS, PHENOLS AND ETHERS
 
1. Name the following compounds according to the IUPAC system:

CBSE Class 12 Chemistry Alcohols Phenols And Ethers Worksheet Set B 1

2. Write the structural formula of the following
i) Phenyl isopentylether
ii) Tert-butyl alcohol
iii) Phenetole
 
3. Account for the following:
 
i) C – O – H bond angle in alcohol is less than tetrahedral angle.
 
ii) C – O bond length in phenol is shorter than that in methanol.
 
iii) C – O – C bond angle in ether is greater than tetrahedral angle.
 
iv) The boiling points of alcohols and phenols are higher than corresponding alkanes of same molecular mass.
 
v) Among the isomeric alcohols the boiling point follows the order 3 0< 2 0< 1 0.
 
vi) Lower alcohols are soluble in water
 
vii) Phenols are more acidic than alcohols.
 
viii) Ethanol is less acidic than methanol.
 
ix) The acidic character of the alcohols follows the order 1 0> 2 0> 3 0
 
x) The reaction of alcohol with acid is carried out in presence of small amount of concentrated H2SO4.
 
xi) Reaction of alcohol with acid chloride is carried out in presence of a base pyridine.
 
xii) The reaction of an alkoxide with a tertiary alkyl halide gives an alkene.
 
xiii) Ortho-nitrophenol is more acidic than ortho-methoxyphenol
 
xiv) Preparation of ethers by acid dehydration of secondary or tertiary alcohol is not a suitable method.
 
xv) The –OH group attached to a carbon of benzene ring activates it towards electrophilic substitution reaction.
 
4. Write equations of the following reactions:
 
i) Friedel-Craft’s alkylation of anisole
ii) tert-butyl alcohol with 20% H3PO4 at 358K
iii) Phenol with bromine in the presence of CS2 at 273K
 
5. Name the reagents used in the following reactions.
 
i) Butan -2 - one to butan -2 –ol.
 
ii) Oxidation of primary alcohol to carboxylic acid
 
iii) Nitration of phenol to 2,4,6 trinitrophenol.
 
iv) Butanal to butanol.
 
v) Oxidation of primary alcohol to aldehyde
 
6. Effect the following conversions:
 
i) Chloro benzene to phenol                   vi) Propene to Propan-1-ol
 
ii) Benzene sulphonic acid to phenol       vii) Propene to propan-2-ol
 
iii) Ethanol to isopropyl alcohol              viii) Phenol to anisole
 
iv) Phenol to picric acid                         ix) Phenol to aspirin
 
v) Anisole to p-methoxy acetophenone   x) Aniline to phenol
 
7. Arrange the following on the increasing order of acidity;
 
Propan-1-ol, Ter. Butyl alcohol , 2,4,6 – trinitro phenol, n-butyl alcohol, 3,5 – dinitro phenol,4-methylphenol, isobutyl alcohol
 
8. Write short note on the following:
 
i) Hydroboration-Oxidation             iv) Kolbe’s reaction
ii) Reimer – Tiemann Reaction.        v) Williamson’s synthesis
iii) Friedel-Craft’s acylation of anisole
 
9. Distinguish between
i) Ethanol and phenol
ii) Propan-2-ol and 2-methyl propan-2-ol
 
10. Write the structures of the products of the following reactions
CBSE Class 12 Chemistry Alcohols Phenols And Ethers Worksheet Set B 2
 
 
11. Write the mechanism of the following
 
CH3CH2OH +HBr → CH3CH2Br + H2O


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

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CBSE Class 12 Chemistry Unit 11 Alcohols, Phenols and Ethers Worksheet

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