Q. What is the main product of the reaction of 1-chloropropane with magnesium in dry ether?
-
A.
Propane
-
B.
Grignard reagent
-
C.
Propyl chloride
-
D.
Magnesium chloride
Solution
The reaction forms a Grignard reagent, which is an organomagnesium compound.
Correct Answer: B — Grignard reagent
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Q. What is the main product of the reaction of benzene with bromine in the presence of FeBr3?
-
A.
Bromobenzene
-
B.
Benzyl bromide
-
C.
Bromobenzyl alcohol
-
D.
Benzene remains unchanged
Solution
The reaction of benzene with bromine in the presence of FeBr3 leads to the formation of bromobenzene through electrophilic aromatic substitution.
Correct Answer: A — Bromobenzene
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Q. What is the main product of the reaction of ethene with ozone followed by zinc reduction?
-
A.
Acetaldehyde
-
B.
Ethylene glycol
-
C.
Acetic acid
-
D.
Ethane
Solution
The ozonolysis of ethene followed by zinc reduction yields acetaldehyde.
Correct Answer: A — Acetaldehyde
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Q. What is the main product when 1-bromopropane is treated with aqueous KOH?
-
A.
Propene
-
B.
1-propanol
-
C.
2-propanol
-
D.
No reaction
Solution
1-bromopropane reacts with aqueous KOH to undergo substitution, yielding 1-propanol as the main product.
Correct Answer: B — 1-propanol
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Q. What is the main product when 1-bromopropane reacts with magnesium in dry ether?
-
A.
Propylmagnesium bromide
-
B.
Propane
-
C.
Magnesium bromide
-
D.
Propan-1-ol
Solution
The reaction of 1-bromopropane with magnesium in dry ether forms propylmagnesium bromide, a Grignard reagent.
Correct Answer: A — Propylmagnesium bromide
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Q. What is the main product when 1-butanol is oxidized?
-
A.
Butanal
-
B.
Butanoic acid
-
C.
Butene
-
D.
Butyne
Solution
Oxidation of 1-butanol leads to the formation of butanoic acid.
Correct Answer: B — Butanoic acid
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Q. What is the main product when 1-butene undergoes hydroboration-oxidation?
-
A.
Butanol
-
B.
Butanal
-
C.
Butyric acid
-
D.
Butene
Solution
The main product of hydroboration-oxidation of 1-butene is butanol.
Correct Answer: A — Butanol
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Q. What is the main product when 1-butyne is treated with HBr?
-
A.
1-bromobutane
-
B.
2-bromobutane
-
C.
1,2-dibromobutane
-
D.
No reaction
Solution
When 1-butyne reacts with HBr, the main product is 2-bromobutane due to Markovnikov's rule.
Correct Answer: B — 2-bromobutane
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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 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 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 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 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 ethylamine is treated with nitrous acid?
-
A.
Ethyl alcohol
-
B.
Ethyl diazonium salt
-
C.
Ethylamine hydrochloride
-
D.
No reaction
Solution
Ethylamine reacts with nitrous acid to form ethyl diazonium salt, which is a key intermediate in organic synthesis.
Correct Answer: B — Ethyl diazonium salt
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Q. What is the main product when phenol is treated with bromine water?
-
A.
Bromobenzene
-
B.
2,4,6-Tribromophenol
-
C.
Bromophenol
-
D.
Benzene
Solution
Phenol reacts with bromine water to form 2,4,6-tribromophenol, a white precipitate.
Correct Answer: B — 2,4,6-Tribromophenol
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Q. What is the main product when phenol is treated with zinc dust?
-
A.
Benzene
-
B.
Cyclohexanol
-
C.
Toluene
-
D.
Phenyl ether
Solution
Zinc dust reduces phenol to benzene.
Correct Answer: A — Benzene
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Q. What is the main product when phenol reacts with bromine water?
-
A.
Bromobenzene
-
B.
2,4,6-tribromophenol
-
C.
Bromophenol
-
D.
Benzene
Solution
Phenol reacts with bromine water to form 2,4,6-tribromophenol, a white precipitate.
Correct Answer: B — 2,4,6-tribromophenol
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Q. What is the main product when phenol reacts with concentrated sulfuric acid?
-
A.
Phenyl sulfate
-
B.
Benzene
-
C.
Catechol
-
D.
Anisole
Solution
The main product is phenyl sulfate, formed by the electrophilic substitution of the hydroxyl group.
Correct Answer: A — Phenyl sulfate
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Q. What is the main product when propan-2-one is treated with sodium bisulfite?
-
A.
Sodium propan-2-one sulfonate
-
B.
Propan-2-ol
-
C.
Propan-2-one bisulfite adduct
-
D.
None of the above
Solution
The main product is the propan-2-one bisulfite adduct.
Correct Answer: C — Propan-2-one bisulfite adduct
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Q. What is the main product when propanal is treated with excess alcohol in the presence of an acid catalyst?
-
A.
Aldol
-
B.
Acetal
-
C.
Ketone
-
D.
Carboxylic acid
Solution
When propanal is treated with excess alcohol in the presence of an acid catalyst, an acetal is formed.
Correct Answer: B — Acetal
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