Q. Which of the following polymers is used in the production of plastic bottles?
A.
Polyethylene terephthalate (PET)
B.
Polystyrene
C.
Polyvinyl chloride (PVC)
D.
Polypropylene
Show solution
Solution
Polyethylene terephthalate (PET) is commonly used in the production of plastic bottles.
Correct Answer: A — Polyethylene terephthalate (PET)
Learn More →
Q. Which of the following polymers is used in the production of synthetic rubber?
A.
Polyvinyl chloride
B.
Polystyrene
C.
Polyisoprene
D.
Polyethylene
Show solution
Solution
Polyisoprene is a key polymer used in the production of synthetic rubber.
Correct Answer: C — Polyisoprene
Learn More →
Q. Which of the following processes is used to produce synthetic rubber?
A.
Polymerization
B.
Condensation
C.
Hydrogenation
D.
Saponification
Show solution
Solution
Synthetic rubber is produced through polymerization of monomers such as butadiene and styrene.
Correct Answer: A — Polymerization
Learn More →
Q. Which of the following properties is NOT typical of elastomers?
A.
High elasticity
B.
Low tensile strength
C.
Good resilience
D.
Brittleness
Show solution
Solution
Brittleness is not a typical property of elastomers; they are known for their high elasticity and resilience.
Correct Answer: D — Brittleness
Learn More →
Q. Which of the following reactions can alkynes undergo?
A.
Electrophilic addition
B.
Nucleophilic substitution
C.
Free radical substitution
D.
All of the above
Show solution
Solution
Alkynes can undergo electrophilic addition reactions due to the presence of the triple bond.
Correct Answer: A — Electrophilic addition
Learn More →
Q. Which of the following reactions can be used to convert an alkene into an alcohol?
A.
Hydrogenation
B.
Hydroboration-oxidation
C.
Dehydrohalogenation
D.
Electrophilic addition
Show solution
Solution
Hydroboration-oxidation is a two-step process that converts alkenes into alcohols.
Correct Answer: B — Hydroboration-oxidation
Learn More →
Q. Which of the following reactions can be used to convert an alkyne to a cis-alkene?
A.
Hydrogenation
B.
Halogenation
C.
Hydroboration
D.
Ozonolysis
Show solution
Solution
Hydroboration followed by oxidation converts alkynes to cis-alkenes.
Correct Answer: C — Hydroboration
Learn More →
Q. Which of the following reactions can be used to convert an alkyne to an alkene?
A.
Hydrogenation
B.
Halogenation
C.
Hydrohalogenation
D.
Dehydrohalogenation
Show solution
Solution
Hydrogenation of an alkyne will add hydrogen across the triple bond, converting it to an alkene.
Correct Answer: A — Hydrogenation
Learn More →
Q. Which of the following reactions can be used to prepare alkynes?
A.
Hydrogenation of alkenes
B.
Dehydrohalogenation of alkyl halides
C.
Oxidation of alkanes
D.
Hydrolysis of alkynes
Show solution
Solution
Alkynes can be prepared by the dehydrohalogenation of alkyl halides.
Correct Answer: B — Dehydrohalogenation of alkyl halides
Learn More →
Q. Which of the following reactions can be used to prepare carboxylic acids?
A.
Hydrolysis of esters
B.
Reduction of ketones
C.
Oxidation of alcohols
D.
All of the above
Show solution
Solution
Carboxylic acids can be prepared by the hydrolysis of esters.
Correct Answer: A — Hydrolysis of esters
Learn More →
Q. Which of the following reactions is characteristic of alkanes?
A.
Electrophilic substitution
B.
Nucleophilic substitution
C.
Free radical substitution
D.
Addition reaction
Show solution
Solution
Alkanes undergo free radical substitution reactions, especially in the presence of halogens.
Correct Answer: C — Free radical substitution
Learn More →
Q. Which of the following reactions is characteristic of alkenes?
A.
Electrophilic addition
B.
Nucleophilic substitution
C.
Free radical substitution
D.
Elimination
Show solution
Solution
Alkenes undergo electrophilic addition reactions due to the presence of a double bond.
Correct Answer: A — Electrophilic addition
Learn More →
Q. Which of the following reactions is characteristic of aromatic compounds?
A.
Addition reaction
B.
Substitution reaction
C.
Elimination reaction
D.
Redox reaction
Show solution
Solution
Aromatic compounds typically undergo electrophilic substitution reactions rather than addition reactions due to their stable aromaticity.
Correct Answer: B — Substitution reaction
Learn More →
Q. Which of the following reactions is not typical for alkenes?
A.
Addition of H2
B.
Addition of HCl
C.
Elimination of H2O
D.
Substitution reaction
Show solution
Solution
Alkenes typically undergo addition reactions rather than substitution reactions.
Correct Answer: D — Substitution reaction
Learn More →
Q. Which of the following statements about alcohols is true?
A.
They are always soluble in water.
B.
They have higher boiling points than alkanes.
C.
They cannot form hydrogen bonds.
D.
They are less dense than water.
Show solution
Solution
Alcohols have higher boiling points than alkanes due to hydrogen bonding.
Correct Answer: B — They have higher boiling points than alkanes.
Learn More →
Q. Which of the following statements about alkanes is true?
A.
They are highly reactive.
B.
They are saturated hydrocarbons.
C.
They contain double bonds.
D.
They are polar molecules.
Show solution
Solution
Alkanes are saturated hydrocarbons, meaning they contain only single bonds between carbon atoms.
Correct Answer: B — They are saturated hydrocarbons.
Learn More →
Q. Which of the following statements about alkenes is true?
A.
They are saturated hydrocarbons.
B.
They can undergo polymerization.
C.
They do not react with electrophiles.
D.
They have a higher boiling point than alkanes.
Show solution
Solution
Alkenes can undergo polymerization due to the presence of a double bond.
Correct Answer: B — They can undergo polymerization.
Learn More →
Q. Which of the following statements about alkynes is incorrect?
A.
They are unsaturated hydrocarbons.
B.
They contain at least one triple bond.
C.
They are more reactive than alkenes.
D.
They have a higher boiling point than alkenes.
Show solution
Solution
Alkynes are generally less reactive than alkenes due to the stability of the triple bond.
Correct Answer: C — They are more reactive than alkenes.
Learn More →
Q. Which of the following statements about alkynes is true?
A.
They are less acidic than alkenes.
B.
They can undergo polymerization.
C.
They have a higher boiling point than alkenes.
D.
They are more stable than alkenes.
Show solution
Solution
Alkynes have a higher boiling point than alkenes due to stronger intermolecular forces.
Correct Answer: C — They have a higher boiling point than alkenes.
Learn More →
Q. Which of the following statements about amines is incorrect?
A.
Amines are basic in nature.
B.
Amines can form salts with acids.
C.
Amines have higher boiling points than alcohols.
D.
Amines can act as nucleophiles.
Show solution
Solution
Amines generally have lower boiling points than alcohols due to the absence of hydrogen bonding in tertiary amines.
Correct Answer: C — Amines have higher boiling points than alcohols.
Learn More →
Q. Which of the following statements about aromatic amines is true?
A.
They are more basic than aliphatic amines
B.
They are less basic than aliphatic amines
C.
They do not react with acids
D.
They are neutral compounds
Show solution
Solution
Aromatic amines are less basic than aliphatic amines due to resonance stabilization of the lone pair on nitrogen.
Correct Answer: B — They are less basic than aliphatic amines
Learn More →
Q. Which of the following statements about aromatic compounds is true?
A.
They are always colorless
B.
They have a sweet smell
C.
They are non-toxic
D.
They can be carcinogenic
Show solution
Solution
Many aromatic compounds can be carcinogenic, such as benzene, which is known to be harmful to human health.
Correct Answer: D — They can be carcinogenic
Learn More →
Q. Which of the following statements about carboxylic acids is true?
A.
They are always soluble in water
B.
They have higher boiling points than alcohols
C.
They can form hydrogen bonds
D.
All of the above
Show solution
Solution
Carboxylic acids can form hydrogen bonds due to the presence of the -COOH group, which contributes to their higher boiling points compared to hydrocarbons.
Correct Answer: C — They can form hydrogen bonds
Learn More →
Q. Which of the following statements about ethers is true?
A.
Ethers are more polar than alcohols
B.
Ethers have higher boiling points than alcohols
C.
Ethers are less reactive than alcohols
D.
Ethers can form hydrogen bonds with water
Show solution
Solution
Ethers are generally less reactive than alcohols due to the absence of a hydroxyl group.
Correct Answer: C — Ethers are less reactive than alcohols
Learn More →
Q. Which of the following statements about haloalkanes is true?
A.
They are polar compounds
B.
They are non-polar compounds
C.
They do not react with nucleophiles
D.
They are always solids
Show solution
Solution
Haloalkanes are polar compounds due to the electronegativity difference between carbon and halogen.
Correct Answer: A — They are polar compounds
Learn More →
Q. Which of the following statements about inductive effect is correct?
A.
It is a permanent effect
B.
It is a temporary effect
C.
It only affects alkenes
D.
It increases basicity
Show solution
Solution
Inductive effect is a permanent effect due to the electronegativity of atoms or groups.
Correct Answer: A — It is a permanent effect
Learn More →
Q. Which of the following statements about isomerism is FALSE?
A.
Isomers have the same molecular formula.
B.
Isomers have different physical properties.
C.
Isomers have different chemical properties.
D.
Isomers cannot exist in the same physical state.
Show solution
Solution
Isomers can exist in the same physical state, such as liquid or solid.
Correct Answer: D — Isomers cannot exist in the same physical state.
Learn More →
Q. Which of the following statements about isomerism is true?
A.
Isomers have the same molecular formula
B.
Isomers have different molecular formulas
C.
Isomers have the same physical properties
D.
Isomers cannot exist in the same compound
Show solution
Solution
Isomers have the same molecular formula but differ in the arrangement of atoms.
Correct Answer: A — Isomers have the same molecular formula
Learn More →
Q. Which of the following statements about isomers is true?
A.
Isomers have different molecular formulas
B.
Isomers have the same connectivity of atoms
C.
Isomers have different physical and chemical properties
D.
Isomers cannot exist in the same compound
Show solution
Solution
Isomers can have different physical and chemical properties despite having the same molecular formula.
Correct Answer: C — Isomers have different physical and chemical properties
Learn More →
Q. Which of the following statements about mesomeric effect is true?
A.
It involves only sigma bonds.
B.
It is a permanent effect.
C.
It is weaker than the inductive effect.
D.
It does not involve resonance structures.
Show solution
Solution
The mesomeric effect is a permanent effect that involves the delocalization of electrons through pi bonds and resonance structures.
Correct Answer: B — It is a permanent effect.
Learn More →
Showing 811 to 840 of 951 (32 Pages)