Q. What is the boiling point trend among alcohols? (2020) 2020
A.
Decreases with molecular weight
B.
Increases with molecular weight
C.
Remains constant
D.
Increases with branching
Show solution
Solution
The boiling point of alcohols increases with molecular weight due to stronger hydrogen bonding.
Correct Answer:
B
— Increases with molecular weight
Learn More →
Q. What is the boiling point trend of alcohols compared to alkanes?
A.
Higher
B.
Lower
C.
Same
D.
Varies
Show solution
Solution
Alcohols have higher boiling points than alkanes due to hydrogen bonding.
Correct Answer:
A
— Higher
Learn More →
Q. What is the functional group of alcohols? (2020)
A.
-OH
B.
-COOH
C.
-CHO
D.
-NH2
Show solution
Solution
The functional group of alcohols is the hydroxyl group (-OH).
Correct Answer:
A
— -OH
Learn More →
Q. What is the functional group of phenols? (2019) 2019
A.
-OH
B.
-COOH
C.
-CHO
D.
-NH2
Show solution
Solution
Phenols contain a hydroxyl group (-OH) directly attached to an aromatic ring.
Correct Answer:
A
— -OH
Learn More →
Q. What is the functional group of phenols? (2021)
A.
-OH
B.
-COOH
C.
-CHO
D.
-NH2
Show solution
Solution
Phenols contain a hydroxyl group (-OH) directly attached to an aromatic hydrocarbon group.
Correct Answer:
A
— -OH
Learn More →
Q. What is the functional group present in phenols? (2021)
A.
-OH
B.
-COOH
C.
-CHO
D.
-NH2
Show solution
Solution
Phenols contain a hydroxyl group (-OH) directly attached to an aromatic hydrocarbon group.
Correct Answer:
A
— -OH
Learn More →
Q. What is the functional group present in phenols? (2021) 2021
A.
-OH
B.
-COOH
C.
-CHO
D.
-NH2
Show solution
Solution
Phenols contain a hydroxyl group (-OH) directly attached to an aromatic hydrocarbon group.
Correct Answer:
A
— -OH
Learn More →
Q. What is the IUPAC name of CH3CH2OH? (2021) 2021
A.
Ethanol
B.
Methanol
C.
Propanol
D.
Butanol
Show solution
Solution
The compound CH3CH2OH is an alcohol with two carbon atoms, which is named Ethanol.
Correct Answer:
A
— Ethanol
Learn More →
Q. What is the main product when phenol is treated with bromine?
A.
Bromobenzene
B.
Bromophenol
C.
Benzene
D.
Bromobutane
Show solution
Solution
Bromine reacts with phenol to form bromophenol, which is a substitution product.
Correct Answer:
B
— Bromophenol
Learn More →
Q. What is the main product when phenol reacts with bromine? (2019)
A.
Bromobenzene
B.
Bromophenol
C.
Benzene
D.
No reaction
Show solution
Solution
Phenol reacts with bromine to form Bromophenol, which is a brominated derivative of phenol.
Correct Answer:
B
— Bromophenol
Learn More →
Q. What is the main product when phenol reacts with sodium hydroxide?
A.
Sodium phenoxide
B.
Sodium benzoate
C.
Benzene
D.
Phenyl acetate
Show solution
Solution
Phenol reacts with sodium hydroxide to form sodium phenoxide, which is a salt of phenol.
Correct Answer:
A
— Sodium phenoxide
Learn More →
Q. What is the main reaction of phenols with bromine water? (2020)
A.
No reaction
B.
Formation of brominated phenol
C.
Formation of phenyl ether
D.
Formation of phenol red
Show solution
Solution
Phenols react with bromine water to form brominated phenols, which are usually colorless or pale yellow.
Correct Answer:
B
— Formation of brominated phenol
Learn More →
Q. What is the main reaction of phenols with sodium hydroxide? (2020)
A.
Formation of sodium phenoxide
B.
Formation of ether
C.
Formation of alcohol
D.
Formation of ketone
Show solution
Solution
Phenols react with sodium hydroxide to form sodium phenoxide, which is a salt of phenol.
Correct Answer:
A
— Formation of sodium phenoxide
Learn More →
Q. What is the product of the oxidation of 2-Propanol? (2022)
A.
Acetone
B.
Ethanol
C.
Propanoic acid
D.
Methanol
Show solution
Solution
2-Propanol oxidizes to form Acetone, which is a ketone.
Correct Answer:
A
— Acetone
Learn More →
Q. What is the product of the oxidation of a primary alcohol? (2020) 2020
A.
Aldehyde
B.
Ketone
C.
Carboxylic acid
D.
Alkene
Show solution
Solution
The oxidation of a primary alcohol first produces an aldehyde, which can further oxidize to a carboxylic acid.
Correct Answer:
A
— Aldehyde
Learn More →
Q. What is the product of the oxidation of a secondary alcohol? (2021)
A.
Aldehyde
B.
Ketone
C.
Carboxylic acid
D.
Alcohol
Show solution
Solution
Secondary alcohols are oxidized to ketones, which contain a carbonyl group (C=O) flanked by two carbon atoms.
Correct Answer:
B
— Ketone
Learn More →
Q. What is the product of the oxidation of ethanol?
A.
Acetic acid
B.
Methanol
C.
Butanoic acid
D.
Propanoic acid
Show solution
Solution
Ethanol oxidizes to acetic acid when reacted with an oxidizing agent.
Correct Answer:
A
— Acetic acid
Learn More →
Q. Which alcohol is commonly known as rubbing alcohol?
A.
Ethanol
B.
Isopropanol
C.
Methanol
D.
Butanol
Show solution
Solution
Isopropanol, or 2-Propanol, is commonly referred to as rubbing alcohol.
Correct Answer:
B
— Isopropanol
Learn More →
Q. Which alcohol is used as an antifreeze agent? (2022)
A.
Ethanol
B.
Methanol
C.
Isopropanol
D.
Butanol
Show solution
Solution
Methanol is commonly used as an antifreeze agent due to its low freezing point.
Correct Answer:
B
— Methanol
Learn More →
Q. Which alcohol is used as an antifreeze? (2022)
A.
Methanol
B.
Ethanol
C.
Isopropanol
D.
Butanol
Show solution
Solution
Methanol is commonly used as an antifreeze due to its low freezing point.
Correct Answer:
A
— Methanol
Learn More →
Q. Which of the following compounds is not an alcohol? (2023)
A.
Ethanol
B.
Methanol
C.
Phenol
D.
Isopropanol
Show solution
Solution
Phenol is not classified as an alcohol because it has an aromatic ring, while the others are aliphatic alcohols.
Correct Answer:
C
— Phenol
Learn More →
Q. Which of the following compounds is not an alcohol? (2023) 2023
A.
Ethanol
B.
Methanol
C.
Phenol
D.
Isopropanol
Show solution
Solution
Phenol is not classified as an alcohol because it has an aromatic ring, while the others are aliphatic alcohols.
Correct Answer:
C
— Phenol
Learn More →
Q. Which of the following is a characteristic reaction of phenols? (2021) 2021
A.
Esterification
B.
Nitration
C.
Halogenation
D.
Hydrogenation
Show solution
Solution
Phenols undergo halogenation readily due to the electron-donating effect of the hydroxyl group.
Correct Answer:
C
— Halogenation
Learn More →
Q. Which of the following is a primary alcohol? (2020) 2020
A.
2-Propanol
B.
1-Butanol
C.
Cyclohexanol
D.
2-Pentanol
Show solution
Solution
1-Butanol has the hydroxyl group (-OH) attached to a primary carbon, making it a primary alcohol.
Correct Answer:
B
— 1-Butanol
Learn More →
Q. Which of the following is a primary alcohol? (2022) 2022
A.
1-butanol
B.
2-butanol
C.
tert-butanol
D.
cyclohexanol
Show solution
Solution
1-butanol has the hydroxyl group (-OH) attached to a primary carbon atom, making it a primary alcohol.
Correct Answer:
A
— 1-butanol
Learn More →
Q. Which of the following is a secondary alcohol? (2021) 2021
A.
1-Pentanol
B.
2-Pentanol
C.
Cyclopentanol
D.
3-Pentanol
Show solution
Solution
2-Pentanol has the hydroxyl group attached to a secondary carbon, making it a secondary alcohol.
Correct Answer:
B
— 2-Pentanol
Learn More →
Q. Which reaction is characteristic of alcohols? (2020)
A.
Dehydration
B.
Hydrogenation
C.
Halogenation
D.
Oxidation
Show solution
Solution
Dehydration is a characteristic reaction of alcohols where they lose water to form alkenes.
Correct Answer:
A
— Dehydration
Learn More →
Q. Which reagent is commonly used to test for the presence of phenols?
A.
Bromine water
B.
Sodium dichromate
C.
Fehling's solution
D.
Tollens' reagent
Show solution
Solution
Bromine water is used to test for phenols, as they will decolorize bromine water.
Correct Answer:
A
— Bromine water
Learn More →
Q. Which reagent is used to convert an alcohol to an alkyl halide? (2023) 2023
A.
PCl5
B.
NaOH
C.
H2SO4
D.
KMnO4
Show solution
Solution
PCl5 is commonly used to convert alcohols to alkyl halides through a substitution reaction.
Correct Answer:
A
— PCl5
Learn More →
Showing 1 to 29 of 29 (1 Pages)
Alcohols & Phenols MCQ & Objective Questions
Understanding "Alcohols & Phenols" is crucial for students preparing for school and competitive exams. These topics not only form a significant part of the chemistry syllabus but also frequently appear in various objective questions and MCQs. Practicing these important questions enhances your grasp of the concepts and boosts your confidence in exam preparation.
What You Will Practise Here
Definitions and classifications of alcohols and phenols
Structure and properties of different types of alcohols
Reactions and mechanisms involving alcohols and phenols
Applications of alcohols and phenols in real-life scenarios
Key differences between alcohols and phenols
Common laboratory tests for identifying alcohols and phenols
Important Alcohols & Phenols MCQ questions with answers
Exam Relevance
The topic of Alcohols & Phenols is highly relevant in various examinations such as CBSE, State Boards, NEET, and JEE. Questions often focus on the properties, reactions, and applications of these compounds. Common patterns include multiple-choice questions that test conceptual understanding and application of knowledge in practical scenarios. Being well-versed in this area can significantly enhance your performance in these exams.
Common Mistakes Students Make
Confusing alcohols with phenols due to their similar structures
Overlooking the importance of functional groups in reactions
Misunderstanding the classification of alcohols based on their structure
Neglecting the significance of isomerism in alcohols and phenols
Failing to apply the correct mechanisms for reactions involving alcohols
FAQs
Question: What are the main types of alcohols?Answer: The main types of alcohols include primary, secondary, and tertiary alcohols, classified based on the carbon atom to which the hydroxyl group is attached.
Question: How do alcohols differ from phenols?Answer: Alcohols contain a hydroxyl group (-OH) attached to a carbon atom, while phenols have a hydroxyl group attached to an aromatic ring.
Start your journey towards mastering Alcohols & Phenols by solving practice MCQs today! Testing your understanding with objective questions will not only prepare you for exams but also solidify your knowledge in this essential topic.
