Q. Which of the following is a characteristic reaction of alcohols?
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A.
Nitration
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B.
Esterification
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C.
Halogenation
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D.
Oxidation
Solution
Alcohols undergo esterification when they react with carboxylic acids to form esters.
Correct Answer: B — Esterification
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Q. Which of the following is a characteristic reaction of ethers?
-
A.
Hydrolysis
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B.
Oxidation
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C.
Nucleophilic substitution
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D.
Dehydration
Solution
Ethers undergo nucleophilic substitution reactions under strong acidic conditions.
Correct Answer: C — Nucleophilic substitution
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Q. Which of the following is a characteristic reaction of phenols?
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A.
Formation of esters
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B.
Formation of ethers
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C.
Electrophilic substitution
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D.
Reduction to alcohols
Solution
Phenols undergo electrophilic substitution reactions due to the presence of the hydroxyl group, which activates the benzene ring.
Correct Answer: C — Electrophilic substitution
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Q. Which of the following is a method for synthesizing alcohols?
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A.
Hydration of alkenes
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B.
Reduction of aldehydes
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C.
Reduction of ketones
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D.
All of the above
Solution
All the listed methods (hydration of alkenes, reduction of aldehydes, and reduction of ketones) can be used to synthesize alcohols.
Correct Answer: D — All of the above
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Q. Which of the following is a method for synthesizing ethers?
-
A.
Dehydration of alcohols
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B.
Hydrogenation of alkenes
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C.
Oxidation of alcohols
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D.
Reduction of ketones
Solution
Ethers can be synthesized by the dehydration of two alcohol molecules.
Correct Answer: A — Dehydration of alcohols
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Q. Which of the following is a method for the preparation of ethers?
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A.
Dehydration of alcohols
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B.
Hydrolysis of alkyl halides
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C.
Oxidation of alcohols
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D.
Reduction of ketones
Solution
Ethers can be prepared by the dehydration of two alcohol molecules.
Correct Answer: A — Dehydration of alcohols
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Q. Which of the following is a primary alcohol?
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A.
1-butanol
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B.
2-butanol
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C.
tert-butanol
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D.
cyclohexanol
Solution
1-butanol has the hydroxyl group attached to a primary carbon atom.
Correct Answer: A — 1-butanol
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Q. Which of the following is a secondary alcohol?
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A.
2-pentanol
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B.
1-pentanol
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C.
3-pentanol
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D.
Cyclopentanol
Solution
2-pentanol has the hydroxyl group on the second carbon, making it a secondary alcohol.
Correct Answer: A — 2-pentanol
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Q. Which of the following is the correct IUPAC name for CH3CH2CH2OH?
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A.
Propan-1-ol
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B.
Butan-1-ol
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C.
Butan-2-ol
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D.
Pentan-1-ol
Solution
The correct IUPAC name for CH3CH2CH2OH is Butan-1-ol, as it has four carbon atoms with the hydroxyl group on the first carbon.
Correct Answer: B — Butan-1-ol
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Q. Which of the following is the correct order of acidity for the following compounds: phenol, ethanol, and water?
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A.
Phenol > Water > Ethanol
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B.
Water > Phenol > Ethanol
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C.
Ethanol > Water > Phenol
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D.
Water > Ethanol > Phenol
Solution
Phenol is more acidic than water, which is more acidic than ethanol due to the stability of the phenoxide ion.
Correct Answer: A — Phenol > Water > Ethanol
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Q. Which of the following statements about alcohols is true?
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A.
They are always soluble in water.
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B.
They have higher boiling points than alkanes.
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C.
They cannot form hydrogen bonds.
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D.
They are less dense than water.
Solution
Alcohols have higher boiling points than alkanes due to hydrogen bonding.
Correct Answer: B — They have higher boiling points than alkanes.
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Q. Which of the following statements about ethers is true?
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A.
Ethers are more polar than alcohols
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B.
Ethers have higher boiling points than alcohols
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C.
Ethers are less reactive than alcohols
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D.
Ethers can form hydrogen bonds with water
Solution
Ethers are generally less reactive than alcohols due to the absence of a hydroxyl group.
Correct Answer: C — Ethers are less reactive than alcohols
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Q. Which of the following statements about phenols is true?
-
A.
They are weak acids.
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B.
They are strong bases.
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C.
They do not react with bromine.
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D.
They are insoluble in water.
Solution
Phenols are weak acids due to the ability of the hydroxyl group to donate a proton.
Correct Answer: A — They are weak acids.
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Q. Which of the following statements is true about ethers?
-
A.
They are polar compounds
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B.
They have high boiling points
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C.
They are highly reactive
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D.
They are used as solvents
Solution
Ethers are commonly used as solvents due to their relatively low reactivity and ability to dissolve a wide range of substances.
Correct Answer: D — They are used as solvents
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Q. Which reagent is commonly used to convert alcohols to alkyl halides?
-
A.
SOCl2
-
B.
HCl
-
C.
PBr3
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D.
All of the above
Solution
All of the listed reagents (SOCl2, HCl, PBr3) can be used to convert alcohols to alkyl halides.
Correct Answer: D — All of the above
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Q. Which reagent is used to convert alcohols to alkyl halides?
-
A.
SOCl2
-
B.
NaOH
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C.
H2SO4
-
D.
KMnO4
Solution
Thionyl chloride (SOCl2) is commonly used to convert alcohols to alkyl halides.
Correct Answer: A — SOCl2
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Q. Which reagent is used to convert an alcohol to an alkyl halide?
-
A.
SOCl2
-
B.
H2SO4
-
C.
NaBr
-
D.
KMnO4
Solution
Thionyl chloride (SOCl2) is commonly used to convert alcohols to alkyl halides.
Correct Answer: A — SOCl2
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Q. Which reagent is used to convert phenol to phenyl ether?
-
A.
Sodium hydroxide
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B.
Sodium phenoxide
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C.
Bromine
-
D.
Hydrochloric acid
Solution
Sodium phenoxide reacts with alkyl halides to form phenyl ethers in a nucleophilic substitution reaction.
Correct Answer: B — Sodium phenoxide
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Showing 31 to 48 of 48 (2 Pages)