Q. What is the main feature that distinguishes alkynes from alkenes?
-
A.
Presence of double bonds
-
B.
Presence of triple bonds
-
C.
Saturation
-
D.
Molecular weight
Solution
Alkynes are distinguished from alkenes by the presence of triple bonds.
Correct Answer: B — Presence of triple bonds
Learn More →
Q. What is the main product of the complete combustion of alkanes?
-
A.
Carbon monoxide
-
B.
Carbon dioxide
-
C.
Water
-
D.
Oxygen
Solution
The main products of the complete combustion of alkanes are carbon dioxide and water.
Correct Answer: B — Carbon dioxide
Learn More →
Q. What is the main product of the complete combustion of hydrocarbons?
-
A.
Carbon monoxide
-
B.
Water
-
C.
Carbon dioxide
-
D.
Hydrogen gas
Solution
The complete combustion of hydrocarbons produces carbon dioxide and water.
Correct Answer: C — Carbon dioxide
Learn More →
Q. What is the main product of the complete combustion of propane (C3H8)?
-
A.
Carbon monoxide
-
B.
Carbon dioxide and water
-
C.
Soot
-
D.
Hydrogen gas
Solution
The complete combustion of propane produces carbon dioxide and water.
Correct Answer: B — Carbon dioxide and water
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
Q. What is the main product when propene is reacted with hydrogen in the presence of a catalyst?
-
A.
Propane
-
B.
Butane
-
C.
Ethane
-
D.
Cyclopropane
Solution
The main product of the hydrogenation of propene is propane.
Correct Answer: A — Propane
Learn More →
Q. What is the main product when propene undergoes hydroboration-oxidation?
-
A.
Propan-1-ol
-
B.
Propan-2-ol
-
C.
Propanoic acid
-
D.
Butanol
Solution
The main product of hydroboration-oxidation of propene is propan-2-ol.
Correct Answer: B — Propan-2-ol
Learn More →
Q. What is the main product when toluene is nitrated?
-
A.
Nitrotoluene
-
B.
Dinitrotoluene
-
C.
Benzaldehyde
-
D.
Benzyl alcohol
Solution
Nitration of toluene primarily yields nitrotoluene, with the nitro group being directed to the ortho and para positions.
Correct Answer: A — Nitrotoluene
Learn More →
Q. What is the main reason for the stability of aromatic compounds?
-
A.
High molecular weight
-
B.
Presence of double bonds
-
C.
Resonance energy
-
D.
Hydrogen bonding
Solution
The stability of aromatic compounds is primarily due to resonance energy, which arises from the delocalization of pi electrons across the ring.
Correct Answer: C — Resonance energy
Learn More →
Q. What is the main reason for the stability of benzene?
-
A.
Presence of double bonds
-
B.
Resonance
-
C.
Hydrogen bonding
-
D.
Ionic interactions
Solution
The stability of benzene arises from resonance, where the electrons are delocalized over the ring structure, lowering the overall energy.
Correct Answer: B — Resonance
Learn More →
Q. What is the main source of alkanes?
-
A.
Coal
-
B.
Natural gas
-
C.
Petroleum
-
D.
Biomass
Solution
The main source of alkanes is petroleum, which contains a mixture of hydrocarbons.
Correct Answer: C — Petroleum
Learn More →
Q. What is the major product of the hydration of propene?
-
A.
Propan-1-ol
-
B.
Propan-2-ol
-
C.
Butanol
-
D.
Ethylene glycol
Solution
The major product of the hydration of propene is propan-2-ol due to Markovnikov's rule.
Correct Answer: B — Propan-2-ol
Learn More →
Q. What is the major product of the reaction of 1-butene with HBr?
-
A.
1-bromobutane
-
B.
2-bromobutane
-
C.
Butane
-
D.
Bromobenzene
Solution
The major product of the reaction of 1-butene with HBr is 2-bromobutane due to Markovnikov's rule.
Correct Answer: B — 2-bromobutane
Learn More →
Q. What is the major product of the reaction of 2-butyne with H2 in the presence of a catalyst?
-
A.
1-butyne
-
B.
butane
-
C.
2-butyne
-
D.
3-butyne
Solution
The major product of hydrogenation of 2-butyne is butane.
Correct Answer: B — butane
Learn More →
Q. What is the major product of the reaction of propene with HBr?
-
A.
1-Bromopropane
-
B.
2-Bromopropane
-
C.
Propyl bromide
-
D.
Bromopropene
Solution
The major product of the reaction of propene with HBr is 2-bromopropane due to Markovnikov's rule.
Correct Answer: B — 2-Bromopropane
Learn More →
Q. What is the major product when propene is treated with bromine?
-
A.
1-bromopropane
-
B.
2-bromopropane
-
C.
Bromopropane
-
D.
No reaction
Solution
The major product of the reaction of propene with bromine is 2-bromopropane due to anti-addition.
Correct Answer: B — 2-bromopropane
Learn More →
Q. What is the major product when propene reacts with HBr?
-
A.
1-Bromopropane
-
B.
2-Bromopropane
-
C.
Propyl bromide
-
D.
Bromopropene
Solution
The major product of the reaction of propene with HBr is 2-Bromopropane due to Markovnikov's rule.
Correct Answer: B — 2-Bromopropane
Learn More →
Q. What is the molecular formula of ethylene?
-
A.
C2H2
-
B.
C2H4
-
C.
C3H6
-
D.
C4H8
Solution
Ethylene is an alkene with the molecular formula C2H4.
Correct Answer: B — C2H4
Learn More →
Q. What is the name of the reaction where benzene is converted to phenol?
-
A.
Hydrogenation
-
B.
Nitration
-
C.
Sulfonation
-
D.
Hydroxylation
Solution
The conversion of benzene to phenol is known as hydroxylation, typically involving the addition of a hydroxyl group (-OH) to the aromatic ring.
Correct Answer: D — Hydroxylation
Learn More →
Q. What is the primary reason for the stability of benzene?
-
A.
Presence of double bonds
-
B.
Resonance stabilization
-
C.
High molecular weight
-
D.
Hydrogen bonding
Solution
Benzene's stability arises from resonance stabilization, where the electrons are delocalized over the entire ring structure.
Correct Answer: B — Resonance stabilization
Learn More →
Q. What is the primary type of reaction that alkanes undergo?
-
A.
Addition
-
B.
Substitution
-
C.
Elimination
-
D.
Condensation
Solution
Alkanes primarily undergo substitution reactions.
Correct Answer: B — Substitution
Learn More →
Q. What is the product of the complete combustion of an alkyne?
-
A.
CO2 and H2O
-
B.
CO and H2O
-
C.
C and H2O
-
D.
C2H4
Solution
The complete combustion of an alkyne produces carbon dioxide (CO2) and water (H2O).
Correct Answer: A — CO2 and H2O
Learn More →
Q. What is the product of the complete hydrogenation of 2-butyne?
-
A.
1-butyne
-
B.
2-butyne
-
C.
butane
-
D.
butyne
Solution
The complete hydrogenation of 2-butyne results in butane.
Correct Answer: C — butane
Learn More →
Showing 31 to 60 of 192 (7 Pages)