Alcohols, Phenols and Ethers
Class 12 · Chemistry · 39 Questions
Identify allylic alcohols in the above examples.
Give structures of the products you would expect when each of the following alcohol reacts with (a) HCl–ZnCl₂ (b) HBr and (c) SOCl₂. (i) Butan-1-ol (ii) 2-Methylbutan-2-ol
Predict the major product of acid catalysed dehydration of (i) 1-methylcyclohexanol and (ii) butan-1-ol
Ortho and para nitrophenols are more acidic than phenol. Draw the resonance structures of the corresponding phenoxide ions.
Write the equations involved in the following reactions: (i) Reimer-Tiemann reaction (ii) Kolbe's reaction
Write the reactions of Williamson synthesis of 2-ethoxy-3-methylpentane starting from ethanol and 3-methylpentan-2-ol.
Which of the following is an appropriate set of reactants for the preparation of 1-methoxy-4-nitrobenzene and why? (i) Br + CH₃ONa (ii) ONa + CH₃Br
Predict the products of the following reactions: (i) CH₃–CH₂–CH₂–O–CH₃ + HBr → (ii) OC₂H₅ + HBr → (iii) OC₂H₅ with Conc. H₂SO₄ and Conc. HNO₃ (iv) (CH₃)₃C–OC₂H₅ + HI →
Write IUPAC names of the following compounds: (i) CH₃–CH(OH)–CH(CH₃)–C(CH₃)₂–CH₃ (ii) H₃C–CH(OH)–CH₂–CH(OH)–CH₂–CH₃ (iii) CH₃–CH(OH)–CH(OH)–CH₃ (iv) HO–CH₂–CH(OH)–CH₂–OH (v) CH₃–O–CH₂–CH(CH₃)–CH₃ (x) C₆H₅–O–C₂H₅ (xi) C₆H₅–O–C₇H₁₅(n-) (xii) CH₃–CH₂–O–CH(CH₃)–CH₂–CH₃
Write structures of the compounds whose IUPAC names are as follows: (i) 2-Methylbutan-2-ol (ii) 1-Phenylpropan-2-ol (iii) 3,5-Dimethylhexane-1,3,5-triol (iv) 2,3-Diethylphenol (v) 1-Ethoxypropane (vi) 2-Ethoxy-3-methylpentane (vii) Cyclohexylmethanol (viii) 3-Cyclohexylpentan-3-ol (ix) Cyclopent-3-en-1-ol (x) 4-Chloro-3-ethylbutan-1-ol
(i) Draw the structures of all isomeric alcohols of molecular formula C₅H₁₂O and give their IUPAC names. (ii) Classify the isomers of alcohols in question 7.3 (i) as primary, secondary and tertiary alcohols.
Explain why propanol has higher boiling point than that of the hydrocarbon, butane?
Alcohols are comparatively more soluble in water than hydrocarbons of comparable molecular masses. Explain this fact.
What is meant by hydroboration-oxidation reaction? Illustrate it with an example.
Give the structures and IUPAC names of monohydric phenols of molecular formula, C₇H₈O.
While separating a mixture of ortho and para nitrophenols by steam distillation, name the isomer which will be steam volatile. Give reason.
Give the equations of reactions for the preparation of phenol from cumene.
Write chemical reaction for the preparation of phenol from chlorobenzene.
Write the mechanism of hydration of ethene to yield ethanol.
You are given benzene, conc. H₂SO₄ and NaOH. Write the equations for the preparation of phenol using these reagents.