Most important questions of alcohol phenols and ethers cbse class 12th chemistry

1. Give the IUPAC name of following Compounds.

2. Classify the compounds as primary, secondary, tertiary Alcohols. 

3. Give the IUPAC name for the following compunds 

4. Draw the Structures of given compound

(i)2-Methylbutan-2-ol

(ii)1-Phenylpropan-2-ol

(iii)3,5-DimethyIhexane-l,3,5-triol

(iv)2,3-Dimethylphenol

(v)1-Ethoxypropane

(vi)2-Ethoxy-3-methylpentane

(vii) Cyclohexylmethanol

(viii) 3-Cyclohexylpentan-3-ol

(ix)Cyclopent-3-en-1-ol

(x)4-ChIoro-3-ethylbutan-1-ol

5. Name the IUPAC of following structure

Q6. (a) Draw the structural formula and write IUPAC names of all the isomeric alcohols with the molecular formula C5H12O.

(b) Classify the isomers of alcohols given in part (a) as primary, secondary and tertiary alcohols.

Q7. O-nitrophenol has lower boiling point than p-nitrophenol. Why?

Q8. The C-O bond is much shorter in phenol than in ethanol. Give reason.

Q9. Of the two hydroxy organic compounds ROH and R’OH, the first one is basic and other is acidic in behaviour. How is R different from R’?

Q11. How would you obtain phenol from benzene?

Q12. Which of the following isomers is more volatile : o-nitrophenol or p-nitrophenol? 

Q13. Out of CH3OH and phenol which one is more acidic and why?

Q14. Explain the mechanism of acid catalysed hydration of an alkene to form corresponding alcohol.

Q15. Explain the following behaviors :

a) Alcohols are more soluble in water than the hydrocarbons of comparable molecular masses.

b) Ortho-nitrophenol is more acidic than ortho-methoxyphenol. 

Q11. Arrange the following compounds in the increasing order of their acid strength: p-cresol, p-nitrophenol, phenol.

Q12. Explain the following observations :

(i) The boiling point of ethanol is higher than that of methoxymethane.

(ii) Phenol is more acidic than ethanol.

(iii) o- and p-nitrophenol are more acidic than phenol. 

Q13. Complete the following reaction equations : 

Q14. How are the following conversions carried out?

(i) Propene to propan-2-ol

(ii) Ethylmagnesium chloride to propan-1-ol.

Q15. How are the following conversions carried out?

(i) Benzyl chloride to benzyl alcohol,

(ii) Methyl magnesium bromide to 2-methylpropan-2-ol.

Q16. Explain the mechanism of acid catalysed hydration of an alkene to form corresponding alcohol.

Q17. How will you convert the following?

(i) Propan-2-ol to propanone

(ii) Phenol to 2, 4, 6-tribromophenol

Q18. How will you convert:

(i) Propene to propan-2-ol?

(ii) Phenol to 2,4,6-Trinitrophenol?

Q19. How will you convert:

(i) Propene to Propan-1-ol?

(ii) Ethanal to Propan-2-ol?

Q20. Write the structures of the products when Butan-2-ol reacts with

the following:

(a) CrO3

(b) SOCl2

Q21. How do you convert the following : 

a) Phenol to anisole

b) Propan-2-ol to 2-methylpropan-2-ol

c) Aniline to phenol.

Q22. Write equation of the nitration of anisole.

Q23. What happens when phenol is oxidized by Na2Cr2O7/H2SO4?

Q24. What happens when phenol is treated with bromine water?

Q25. Illustrate the following reactions giving a chemical equation for each :

(i) Kolbe’s reaction

(ii) Williamsons synthesis of an ether

Q26. Explain the following reactions with an example for each :

(i) Reimer-Tiemann reaction

(ii) Friedel-Crafts acetylation of anisole

Q27. Write the mechanism of acid dehydration of ethanol to yield ethene.

Q28. Give a chemical test to distinguish between primary, secondary and tertiary alcohol with a suitable example.