Frank Chapter 11E Alcohols ICSE Solutions and MCQ Class 10 Chemistry

Frank Solutions for Chapter 11E Alcohols Class 10 Chemistry ICSE

1. Write the molecular formula and structural formula of ethanol. 

Answer

Molecular formula of Ethanol : C₂H₅OH 
Structural formula of Ethanol  : 

2. Give the necessary conditions and equations of getting ethanol from:
(a) Alkyl halide
(b) An ethene

Answer 

Necessary conditions and equations of getting ethanol from the following are : 

(a) Alkyl halide : alkyl halide on hydrolysis with dilute alkali give alcohol 

3. Name the following :

(i) Oxidising agent used to convert ethanol to acetic acid
(ii) Catalyst used in the Esterification reaction
(iii) A toxic alcohol
(iv) 100% ethanol

Answer 

(i) Potassium dichromate and potassium permanganate in the presence of acid. 
(ii) Conc. H₂SO₄ 
(iii) Methanol 
(iv) Ethyl alcohol 

4. How does ethanol reacts with
(a) Metallic sodium
(b) Acetic acid
(c) Conc. H₂SO₄

Answer 

5. Write the composition of the following :
(i) Methylated spirit 
(ii) Power  alcohol 
(iii) Spurious alcohol 

Answer 

(i) Methylated spirit : Ethyl alcohol mixed with certain percentage of methyl alcohol. 
(ii) Power  alcohol : Petrol : Alcohol in 4 : 1 
(iii) Spurious alcohol : Ethyl alcohol mixed with higher percentage of methyl alcohol 

6. Give three uses of ethanol. 

Answer 

Uses of ethanol : 

1. In the manufacture of alcoholic beverages 
2. As a solvent for paint, oils, perfumes 
3. As an antifreeze in automobile radiators 

7. How will you carry out the following conversions : 
(i) Ethanol to ethene 
(ii) Bromoethane to ethanol 

Answer 

8. A neutral compound 'X' of molecular formula C₂H₆O on oxidation with acidified potassium dichromate gives a compound 'Y' . Compound 'X' react with 'Y' on warming in presence of conc. H₂SO₄ to give a sweet smelling substance 'Z'. What are 'X' , 'Y' , and 'Z' ? Give equations of the reaction  involved. 

Answer