Q. What is the main product of the dehydration of ethanol?
-
A.
Ethylene
-
B.
Acetaldehyde
-
C.
Ethane
-
D.
Diethyl ether
Solution
The dehydration of ethanol primarily produces ethylene (ethene) through the elimination of water.
Correct Answer: A — Ethylene
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Q. What is the main product of the electrolysis of water?
-
A.
Hydrogen gas
-
B.
Oxygen gas
-
C.
Hydrochloric acid
-
D.
Hydrogen peroxide
Solution
The main products of the electrolysis of water are hydrogen gas (H2) and oxygen gas (O2).
Correct Answer: A — Hydrogen gas
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Q. What is the main product of the fusion of hydrogen nuclei? (2022)
-
A.
Helium
-
B.
Carbon
-
C.
Oxygen
-
D.
Nitrogen
Solution
The fusion of hydrogen nuclei primarily produces helium, along with a release of energy.
Correct Answer: A — Helium
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Q. What is the main product of the hydrogenation of benzene?
-
A.
Cyclohexane
-
B.
Toluene
-
C.
Phenol
-
D.
Benzaldehyde
Solution
The hydrogenation of benzene results in the formation of cyclohexane, a saturated hydrocarbon.
Correct Answer: A — Cyclohexane
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Q. What is the main product of the hydrolysis of an ester?
-
A.
Alcohol
-
B.
Carboxylic acid
-
C.
Alkene
-
D.
Ketone
Solution
The hydrolysis of an ester produces a carboxylic acid and an alcohol.
Correct Answer: B — Carboxylic acid
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Q. What is the main product of the nitration of benzene?
-
A.
Nitrobenzene
-
B.
Benzene-1,2-diol
-
C.
Benzaldehyde
-
D.
Benzyl alcohol
Solution
The nitration of benzene typically produces nitrobenzene as the main product through electrophilic substitution.
Correct Answer: A — Nitrobenzene
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Q. What is the main product of the oxidation of a primary alcohol?
-
A.
Aldehyde
-
B.
Ketone
-
C.
Carboxylic acid
-
D.
Alcohol
Solution
Oxidation of a primary alcohol typically leads to the formation of a carboxylic acid.
Correct Answer: C — Carboxylic acid
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Q. What is the main product of the oxidation of ethanol?
-
A.
Acetic acid
-
B.
Formic acid
-
C.
Butanoic acid
-
D.
Propanoic acid
Solution
The main product of the oxidation of ethanol is acetic acid.
Correct Answer: A — Acetic acid
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Q. What is the main product of the reaction between aluminum and hydrochloric acid? (2023)
-
A.
AlCl3
-
B.
H2
-
C.
Al(OH)3
-
D.
Al2Cl6
Solution
The main product of the reaction between aluminum and hydrochloric acid is hydrogen gas (H2).
Correct Answer: B — H2
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Q. What is the main product of the reaction between an acid and a base? (2019)
-
A.
Salt
-
B.
Water
-
C.
Hydrogen gas
-
D.
Carbon dioxide
Solution
The main products of the neutralization reaction between an acid and a base are salt and water.
Correct Answer: A — Salt
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Q. What is the main product of the reaction between an acid and a carbonate? (2019)
-
A.
Salt
-
B.
Water
-
C.
Carbon dioxide
-
D.
All of the above
Solution
The reaction between an acid and a carbonate produces salt, water, and carbon dioxide.
Correct Answer: D — All of the above
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Q. What is the main product of the reaction between an alcohol and a carboxylic acid?
-
A.
Ester
-
B.
Ether
-
C.
Aldehyde
-
D.
Ketone
Solution
The reaction between an alcohol and a carboxylic acid typically produces an ester.
Correct Answer: A — Ester
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Q. What is the main product of the reaction between ethene and bromine?
-
A.
Bromobutane
-
B.
1,2-Dibromoethane
-
C.
Bromoethane
-
D.
Ethyl bromide
Solution
The reaction of ethene with bromine results in the formation of 1,2-dibromoethane through an electrophilic addition mechanism.
Correct Answer: B — 1,2-Dibromoethane
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Q. What is the main product of the reaction between hydrogen and oxygen?
-
A.
Ozone
-
B.
Water
-
C.
Hydrogen peroxide
-
D.
Hydrochloric acid
Solution
The main product of the reaction between hydrogen and oxygen is water (H2O).
Correct Answer: B — Water
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Q. What is the main product of the reaction between sodium and chlorine?
-
A.
NaCl
-
B.
NaCl2
-
C.
Na2Cl
-
D.
Na2Cl2
Solution
The main product of the reaction between sodium and chlorine is sodium chloride (NaCl).
Correct Answer: A — NaCl
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Q. What is the main product of the reaction of 1-bromo-2-methylpropane with KOH in ethanol? (2020)
-
A.
2-methylpropene
-
B.
2-methylpropan-1-ol
-
C.
1-bromo-2-methylpropane
-
D.
2-bromo-2-methylpropane
Solution
The reaction of 1-bromo-2-methylpropane with KOH in ethanol leads to the formation of 2-methylpropene through an elimination reaction.
Correct Answer: A — 2-methylpropene
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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 of the thermal decomposition of ammonium dichromate? (2023)
-
A.
Cr2O3
-
B.
CrO3
-
C.
Cr
-
D.
NH3
Solution
The thermal decomposition of ammonium dichromate produces chromium(III) oxide (Cr2O3) as the main product.
Correct Answer: A — Cr2O3
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Q. What is the main product of the thermal decomposition of calcium carbonate (CaCO3)? (2019)
-
A.
Calcium oxide (CaO)
-
B.
Carbon dioxide (CO2)
-
C.
Calcium hydroxide (Ca(OH)2)
-
D.
Calcium carbide (CaC2)
Solution
The thermal decomposition of calcium carbonate produces calcium oxide (CaO) and carbon dioxide (CO2).
Correct Answer: A — Calcium oxide (CaO)
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Q. What is the main product of the thermal decomposition of calcium carbonate?
-
A.
Calcium oxide
-
B.
Calcium hydroxide
-
C.
Carbon dioxide
-
D.
Calcium bicarbonate
Solution
The thermal decomposition of calcium carbonate produces calcium oxide and carbon dioxide.
Correct Answer: A — Calcium oxide
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Q. What is the main product when 1-bromobutane reacts with sodium hydroxide in ethanol? (2021)
-
A.
Butanol
-
B.
Butene
-
C.
Sodium bromide
-
D.
Butyric acid
Solution
The reaction of 1-bromobutane with sodium hydroxide in ethanol leads to elimination, forming butene as the main product.
Correct Answer: B — Butene
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Q. What is the main product when 1-bromopropane is treated with alcoholic KOH? (2021)
-
A.
Propene
-
B.
1-propanol
-
C.
2-propanol
-
D.
Bromopropane
Solution
Alcoholic KOH promotes elimination reactions, leading to the formation of propene from 1-bromopropane.
Correct Answer: A — Propene
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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 is treated with magnesium in dry ether? (2019)
-
A.
Propane
-
B.
Grignard reagent
-
C.
Bromopropane
-
D.
Propyl alcohol
Solution
The reaction of 1-bromopropane with magnesium in dry ether forms the Grignard reagent, propylmagnesium bromide.
Correct Answer: B — Grignard reagent
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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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