Question 61:
Which of the following compounds can be synthesized using the Grignard reaction?
A) Aldehyde
B) Ketone
C) Alcohol
D) All of the above
Answer: D) All of the above
Explanation: The Grignard reaction can be used to synthesize aldehydes, ketones, and alcohols by reacting with appropriate electrophiles.
Question 62:
What is the primary role of sulfuric acid in the synthesis of esters?
A) It acts as a nucleophile.
B) It provides a proton to alcohol.
C) It serves as a catalyst to facilitate the reaction.
D) It reacts with the ester to produce an alcohol.
Answer: C) It serves as a catalyst to facilitate the reaction.
Explanation: Sulfuric acid acts as a catalyst in the esterification reaction, helping to increase the reaction rate.
Question 63:
Which of the following is NOT a method of alcohol synthesis?
A) Hydroboration-oxidation of alkenes
B) Reduction of carbonyl compounds
C) Grignard reagent reactions
D) Condensation of two alkyl halides
Answer: D) Condensation of two alkyl halides
Explanation: The condensation of two alkyl halides typically leads to the formation of ethers, not alcohols. The other methods can synthesize alcohols.
Question 64:
Which of the following is an example of a diol?
A) Ethanol
B) Butan-1,3-diol
C) Propan-1-ol
D) Isopropanol
Answer: B) Butan-1,3-diol
Explanation: A diol contains two hydroxyl (-OH) groups, and butan-1,3-diol is a clear example.
Question 65:
Which of the following compounds is the most acidic?
A) Ethanol
B) 2-Butanol
C) Phenol
D) Methanol
Answer: C) Phenol
Explanation: Phenol is the most acidic among the given compounds due to the resonance stabilization of its conjugate base.
Question 66:
What is the product of the oxidation of cyclohexanol?
A) Cyclohexene
B) Cyclohexanone
C) Cyclohexyl chloride
D) Cyclohexane
Answer: B) Cyclohexanone
Explanation: The oxidation of cyclohexanol (a secondary alcohol) leads to the formation of cyclohexanone (a ketone).
Question 67:
Which type of alcohol is most commonly used as a solvent in organic reactions?
A) Primary
B) Secondary
C) Tertiary
D) None of the above
Answer: A) Primary
Explanation: Primary alcohols are often used as solvents in organic reactions due to their reactivity and solubility characteristics.
Question 68:
Which of the following compounds is an example of a branched-chain alcohol?
A) 1-Pentanol
B) 2-Pentanol
C) 2-Methyl-1-butanol
D) 1-Butanol
Answer: C) 2-Methyl-1-butanol
Explanation: 2-Methyl-1-butanol is a branched-chain alcohol due to the presence of a methyl group branching off the main chain.
Question 69:
What happens when a phenol is treated with excess bromine?
A) No reaction occurs.
B) It forms a brominated phenol.
C) It forms an ether.
D) It is oxidized to a ketone.
Answer: B) It forms a brominated phenol.
Explanation: Phenols readily react with excess bromine to form brominated phenol products, typically at multiple positions on the ring.
Question 70:
Which of the following is the correct IUPAC name for CH3-CH(OH)-CH2-CH3?
A) 2-Butanol
B) 3-Butanol
C) 1-Butanol
D) 2-Pentanol
Answer: A) 2-Butanol
Explanation: The correct IUPAC name is 2-butanol, indicating that the hydroxyl group is on the second carbon of the butane chain.
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