Q. What is the main product when 1-chloropropane is treated with alcoholic KOH? (2019)
-
A.
Propene
-
B.
Propan-1-ol
-
C.
Propan-2-ol
-
D.
Chloropropane
Solution
Alcoholic KOH promotes elimination reactions, leading to the formation of propene from 1-chloropropane.
Correct Answer: A — Propene
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Q. What is the main product when 1-chloropropane is treated with aqueous KOH? (2019)
-
A.
Propene
-
B.
Propan-1-ol
-
C.
Propan-2-ol
-
D.
Chloropropane
Solution
The treatment of 1-chloropropane with aqueous KOH leads to the formation of propan-1-ol through nucleophilic substitution.
Correct Answer: B — Propan-1-ol
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Q. What is the main product when 1-chloropropane is treated with excess alcoholic KOH? (2020)
-
A.
Propene
-
B.
1-Propanol
-
C.
2-Propanol
-
D.
Chloropropane
Solution
Excess alcoholic KOH promotes elimination reactions, leading to the formation of propene from 1-chloropropane.
Correct Answer: A — Propene
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Q. What is the main product when 1-chloropropane is treated with magnesium in dry ether?
-
A.
Propane
-
B.
Propylmagnesium chloride
-
C.
Cyclopropane
-
D.
Chloromagnesium propyl
Solution
The reaction forms propylmagnesium chloride, a Grignard reagent.
Correct Answer: B — Propylmagnesium chloride
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Q. What is the main product when 2-butyne is treated with excess H2 in the presence of a catalyst?
-
A.
1-butyne
-
B.
Butane
-
C.
2-butyne
-
D.
Ethyne
Solution
The main product is butane, as 2-butyne is fully hydrogenated to form butane.
Correct Answer: B — Butane
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Q. What is the main product when 2-butyne undergoes hydroboration-oxidation?
-
A.
Butanol
-
B.
Butanal
-
C.
Butyric acid
-
D.
Butene
Solution
The main product is Butanol when 2-butyne undergoes hydroboration-oxidation.
Correct Answer: A — Butanol
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Q. What is the main product when a carboxylic acid is reduced?
-
A.
Alcohol
-
B.
Aldehyde
-
C.
Ketone
-
D.
Alkane
Solution
The main product of the reduction of a carboxylic acid is an alcohol.
Correct Answer: A — Alcohol
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Q. What is the main product when aluminum reacts with hydrochloric acid? (2023)
-
A.
AlCl3
-
B.
H2
-
C.
Al(OH)3
-
D.
Al2Cl6
Solution
When aluminum reacts with hydrochloric acid, hydrogen gas (H2) is produced along with aluminum chloride (AlCl3).
Correct Answer: B — H2
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Q. What is the main product when an alcohol is dehydrated?
-
A.
Alkene
-
B.
Alkane
-
C.
Ether
-
D.
Aldehyde
Solution
Dehydration of alcohols typically yields alkenes through elimination reactions.
Correct Answer: A — Alkene
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Q. What is the main product when an alcohol is oxidized with potassium dichromate?
-
A.
Aldehyde
-
B.
Ketone
-
C.
Carboxylic acid
-
D.
All of the above
Solution
Depending on the type of alcohol, oxidation with potassium dichromate can yield aldehydes, ketones, or carboxylic acids.
Correct Answer: D — All of the above
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Q. What is the main product when an alcohol is oxidized?
-
A.
Alkane
-
B.
Aldehyde
-
C.
Ketone
-
D.
Carboxylic acid
Solution
The oxidation of a primary alcohol typically produces a carboxylic acid.
Correct Answer: D — Carboxylic acid
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Q. What is the main product when an alcohol undergoes dehydration?
-
A.
Alkane
-
B.
Alkene
-
C.
Alkyne
-
D.
Ether
Solution
Dehydration of an alcohol typically produces an alkene.
Correct Answer: B — Alkene
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Q. What is the main product when an aldehyde is treated with sodium bisulfite? (2019)
-
A.
Aldol
-
B.
Bisulfite adduct
-
C.
Hydrocarbon
-
D.
Alcohol
Solution
The main product formed when an aldehyde reacts with sodium bisulfite is a bisulfite adduct.
Correct Answer: B — Bisulfite adduct
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Q. What is the main product when an aldehyde reacts with a Grignard reagent?
-
A.
Alcohol
-
B.
Ketone
-
C.
Carboxylic acid
-
D.
Alkane
Solution
The reaction of an aldehyde with a Grignard reagent produces a primary alcohol after hydrolysis.
Correct Answer: A — Alcohol
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Q. What is the main product when an alkene undergoes hydrohalogenation?
-
A.
Alcohol
-
B.
Haloalkane
-
C.
Alkane
-
D.
Alkyl halide
Solution
The main product of hydrohalogenation of an alkene is a haloalkane.
Correct Answer: B — Haloalkane
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Q. What is the main product when an amine is treated with nitrous acid?
-
A.
Diazonium salt
-
B.
Alcohol
-
C.
Aldehyde
-
D.
Ketone
Solution
Amines react with nitrous acid to form diazonium salts, which are important intermediates in organic synthesis.
Correct Answer: A — Diazonium salt
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Q. What is the main product when an amine reacts with a carbonyl compound? (2019)
-
A.
Amide
-
B.
Alcohol
-
C.
Aldehyde
-
D.
Ketone
Solution
The main product of the reaction between an amine and a carbonyl compound is an amide.
Correct Answer: A — Amide
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Q. What is the main product when an amine reacts with a haloalkane? (2019)
-
A.
Amide
-
B.
Quaternary ammonium salt
-
C.
Alcohol
-
D.
Ester
Solution
The main product of the reaction between an amine and a haloalkane is a quaternary ammonium salt.
Correct Answer: B — Quaternary ammonium salt
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Q. What is the main product when an amine reacts with an acyl chloride?
-
A.
Amide
-
B.
Ester
-
C.
Alcohol
-
D.
Aldehyde
Solution
The reaction of an amine with an acyl chloride produces an amide.
Correct Answer: A — Amide
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Q. What is the main product when an amine reacts with an alkyl halide?
-
A.
Amide
-
B.
Quaternary ammonium salt
-
C.
Alcohol
-
D.
Ester
Solution
The main product is a quaternary ammonium salt when an amine reacts with an alkyl halide, as the amine can be further alkylated.
Correct Answer: B — Quaternary ammonium salt
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Q. What is the main product when an amine reacts with nitrous acid?
-
A.
Diazonium salt
-
B.
Alcohol
-
C.
Aldehyde
-
D.
Amide
Solution
The reaction of an amine with nitrous acid produces a diazonium salt.
Correct Answer: A — Diazonium salt
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Q. What is the main product when benzaldehyde is treated with Grignard reagent followed by hydrolysis?
-
A.
Benzyl alcohol
-
B.
Benzyl ketone
-
C.
Benzyl aldehyde
-
D.
Benzyl ether
Solution
The reaction of benzaldehyde with Grignard reagent followed by hydrolysis yields benzyl alcohol.
Correct Answer: A — Benzyl alcohol
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Q. What is the main product when benzene reacts with chlorine in the presence of FeCl3?
-
A.
Chlorobenzene
-
B.
Benzyl chloride
-
C.
Benzene-1,2-dichloride
-
D.
Phenol
Solution
The reaction of benzene with chlorine in the presence of FeCl3 leads to the formation of chlorobenzene through electrophilic aromatic substitution.
Correct Answer: A — Chlorobenzene
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Q. What is the main product when benzoic acid is treated with thionyl chloride?
-
A.
Benzoyl chloride
-
B.
Benzyl alcohol
-
C.
Benzene
-
D.
Benzoate salt
Solution
Thionyl chloride (SOCl2) converts benzoic acid to benzoyl chloride, which is an acyl chloride.
Correct Answer: A — Benzoyl chloride
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Q. What is the main product when butanoic acid is treated with thionyl chloride?
-
A.
Butyl chloride
-
B.
Butanoate
-
C.
Butanoyl chloride
-
D.
Butanol
Solution
The reaction of butanoic acid with thionyl chloride produces butanoyl chloride.
Correct Answer: C — Butanoyl chloride
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Q. What is the main product when chlorobenzene is treated with sodium hydroxide at high temperature?
-
A.
Phenol
-
B.
Benzene
-
C.
Chlorobenzene remains unchanged
-
D.
Sodium phenoxide
Solution
Chlorobenzene reacts with sodium hydroxide at high temperature to form phenol through nucleophilic aromatic substitution.
Correct Answer: A — Phenol
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Q. What is the main product when ethanol is dehydrated?
-
A.
Ethylene
-
B.
Acetaldehyde
-
C.
Diethyl ether
-
D.
Ethane
Solution
Dehydration of ethanol typically yields ethylene (ethene) as the main product.
Correct Answer: A — Ethylene
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Q. What is the main product when ethene reacts with bromine?
-
A.
Bromethane
-
B.
1,2-Dibromoethane
-
C.
Ethane
-
D.
Bromoethane
Solution
The reaction of ethene with bromine results in the formation of 1,2-dibromoethane.
Correct Answer: B — 1,2-Dibromoethane
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Q. What is the main product when ethene reacts with hydrogen in the presence of a catalyst?
-
A.
Ethane
-
B.
Ethanol
-
C.
Ethyl chloride
-
D.
Acetylene
Solution
The main product is ethane, formed by the hydrogenation of ethene.
Correct Answer: A — Ethane
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Q. What is the main product when ethene reacts with water in the presence of an acid? (2023)
-
A.
Ethanol
-
B.
Ethane
-
C.
Acetic acid
-
D.
Ethylene glycol
Solution
The reaction of ethene with water in the presence of an acid yields ethanol.
Correct Answer: A — Ethanol
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