Which of the following is by-product in the reaction of obtaining phenol from cumene?
- ATribromophenol
- BBanoquinone
- CPicric acid
- ✓Acetone
Answer: D.
View full solution →Question types
Alcohols, Phenols and Ethers question types
190 questions across 7 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.
190
Questions
7
Question groups
5
Question types
01
M.C.Q [1M]
39 Q→02Fill in the blank. [1M]
14 Q→031 Marks Question
89 Q→04Short Answer Type Questions [2M]
14 Q→053 Marks Question
14 Q→06Long Answer Type Questions [5M]
11 Q→074 Marks Questions
9 Q→Sample Questions
Alcohols, Phenols and Ethers questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Which is the correct increasing order of boiling points of the following compounds- $CH _3 OCH _3$, $CH _3 CH _2 OH$ and $CH _3 CH _2 CH _3$.
- A$CH _3 CH _2 OH < CH _3 OCH _3< CH _3 CH _2 CH _3$
- B$CH _3 CH _2 OH < CH _3 CH _2 CH _3< CH _3 OCH _3$
- ✓$CH _3 CH _2 CH _3< CH _3 OCH _3< CH _3 CH _2 OH$
- D$CH _3 CH _2 CH _3< CH _3 CH _2 OH < CH _3 OCH _3$
Answer: C.
View full solution →Which of the following reaction is possible?
- ✓
- B
- CBoth (A) and (B)
- DNeither (A) nor (B)
Answer: A.
View full solution →Which of the following alcohol has maximum solubility in water :
- AIsobutyl alcohol
- ✓Tertiary butyl alcohol
- CSecondary butyl alcohol
- D$n$-Butyl alcohol
Answer: B.
View full solution →
- A3, 3-Dimethyl cyclohexan-l-ol
- B1, 1-Dimethyl-3-hydroxy cyclohexane
- C1, 1-Dimethyl-3-cyclohexanol
- D3, 3-Dimethyl-1-hydroxy cyclohexane
Glucose is converted to ethanol in presence of __________ enzyme.
In benzylic alcohols - OH group is bonded with _________ hybridised carbon.
In Williamson synthesis __________ reacts with sodium alkoxide to form dialkyl ether.
Out of o-nitrophenol and p-nitrophenol ___________ is less volatile.
Williamson synthesis used in the preparation of __________ .
Write the IUPAC name of isobutyl alcohol.
Alcohols are comparatively more soluble in water than hydrocarbons of comparable molecular masses. Explain this fact.
Explain why propanol has higher boiling point than that of the hydrocarbon, butane?
Show how would you synthesise the alcohols from appropriate alkene :
Show how would you synthesise the alcohols from appropriate alkene :
Give the equation of reaction for the preparation of phenol from cumene.
Give the structures and IUPAC names of monohydric phenols of molecular formula $C _7 H _6 O _8$.
View full solution →Explain the fact that in aryl alkyl ethers (i) the alkoxy group activates the benzene ring towards electrophilic substitution and (ii) it directs the incoming substituents to ortho and para positions in benzene ring.
Write the equation of the reaction of hydrogen iodide with :
1-propoxypropane
1-propoxypropane
Explain the following with an example :
Williamson ether synthesis.
Williamson ether synthesis.
Give reasons :
(i) Carbon-oxygen bond length in phenol is slightly less than that of methanol.
(ii) The $C - O - C$ bond angle present in ether is greater than the tetrahedral angle.
(iii) The boiling point of isomeric alcohols decreases with increase in branching.
View full solution →(i) Carbon-oxygen bond length in phenol is slightly less than that of methanol.
(ii) The $C - O - C$ bond angle present in ether is greater than the tetrahedral angle.
(iii) The boiling point of isomeric alcohols decreases with increase in branching.
While separating a mixture of ortho and para nitrophenols by steam distillation, name the isomer which will be steam volatile. Give reason.
What is meant by hydroboration-oxidati on reaction? Illustrate it with an example.
Write the mechanism of the reaction of HI with methoxymethane.
Preparation of ethers by acid dehydration of secondary or tertiary alcohols is not a suitable method. Give reason.
Write the chemical reactions of $C _2 H _5 OH$ with following compounds :
(i) $CH _2 N_2$ (diazomethane) (ii) ketone, (iii) $HC \equiv$ $C H$ (iv) $C H _3 N C O$ (Methyl-isocyanate) (v) $C H _3 C H O$ (ethanol) (vi) conc. $H _2 SO _4$ at $0^{\circ} C$.
View full solution →(i) $CH _2 N_2$ (diazomethane) (ii) ketone, (iii) $HC \equiv$ $C H$ (iv) $C H _3 N C O$ (Methyl-isocyanate) (v) $C H _3 C H O$ (ethanol) (vi) conc. $H _2 SO _4$ at $0^{\circ} C$.
Explain the following :
(i) Fermentation
(ii) Dehydration
(iii) Hydrogen bonding in alcohols.
(i) Fermentation
(ii) Dehydration
(iii) Hydrogen bonding in alcohols.
How will you obtain the following compounds from ethyl alcohol? Explain with equation :
(i) Diethyl ether
(ii) Iodoform
(iii) Ethyl acetate
(iv) Acetaldehyde
(i) Diethyl ether
(ii) Iodoform
(iii) Ethyl acetate
(iv) Acetaldehyde
Differentiate between $1^{\circ}, 2^{\circ}$ and $3^{\circ}$ alcohols by catalytic dehydrogenation.
View full solution →Explain the properties and uses of methanol and ethanol.
Give reason :
(i) The boiling point of ethanol is higher than that of hydroxymethane.
(ii) Phenol is a stronger acid than alcohol.
(iii) Ethanol easily dissolve in water.
(i) The boiling point of ethanol is higher than that of hydroxymethane.
(ii) Phenol is a stronger acid than alcohol.
(iii) Ethanol easily dissolve in water.
When 3-methylbutan-2-ol is treated with HBr , the following reaction takes place :
Give a mechanism for this reaction.
(Hint : The seconary carbocation formed in step II rearranges to a more stable tertiary carbocation by a hydride ion shift from 3rd carbon atom.)
Give a mechanism for this reaction.
(Hint : The seconary carbocation formed in step II rearranges to a more stable tertiary carbocation by a hydride ion shift from 3rd carbon atom.)
(i) Draw the structures of all isomeric alcohols of molecular formula $C _5 H _{12} O$ and give their IUPAC names.
(ii) Classify the isomers of alcohols in question 7.3. (i) as primary, secondary and tertiary alcohols.
View full solution →(ii) Classify the isomers of alcohols in question 7.3. (i) as primary, secondary and tertiary alcohols.
How is 1-propoxypropane synthesised from propan-1-ol? Write mechanism of this reaction.
Illustrate with examples the limitations of Williamson synthesis for the preparation of certain types of ethers.
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