Q. What type of polymer is nylon?
-
A.
Addition polymer
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B.
Condensation polymer
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C.
Natural polymer
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D.
Composite polymer
Solution
Nylon is a condensation polymer formed from the reaction of diamines and dicarboxylic acids.
Correct Answer: B — Condensation polymer
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Q. What type of polymer is rubber classified as? (2019)
-
A.
Thermoplastic
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B.
Thermosetting
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C.
Elastomer
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D.
Composite
Solution
Rubber is classified as an elastomer, which is a type of polymer that exhibits elastic properties.
Correct Answer: C — Elastomer
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Q. What type of reaction forms a disaccharide from two monosaccharides? (2022)
-
A.
Hydrolysis
-
B.
Condensation
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C.
Oxidation
-
D.
Reduction
Solution
A condensation reaction occurs when two monosaccharides combine to form a disaccharide, releasing water.
Correct Answer: B — Condensation
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Q. What type of reaction is involved in the conversion of an alkene to an alkane? (2023)
-
A.
Hydrogenation
-
B.
Dehydration
-
C.
Halogenation
-
D.
Oxidation
Solution
Hydrogenation is the process of adding hydrogen to an alkene to convert it into an alkane.
Correct Answer: A — Hydrogenation
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Q. What type of reaction is the conversion of an alkene to an alkane? (2023)
-
A.
Hydrogenation
-
B.
Dehydration
-
C.
Halogenation
-
D.
Oxidation
Solution
The conversion of an alkene to an alkane is called hydrogenation, where hydrogen is added across the double bond.
Correct Answer: A — Hydrogenation
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Q. What type of reaction occurs when 1-bromopropane reacts with sodium cyanide? (2023)
-
A.
Elimination
-
B.
Substitution
-
C.
Addition
-
D.
Redox
Solution
The reaction between 1-bromopropane and sodium cyanide is a nucleophilic substitution reaction, resulting in the formation of propanenitrile.
Correct Answer: B — Substitution
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Q. What type of reaction occurs when 1-bromopropane reacts with sodium ethoxide? (2023)
-
A.
Elimination
-
B.
Nucleophilic substitution
-
C.
Addition
-
D.
Oxidation
Solution
The reaction of 1-bromopropane with sodium ethoxide is a nucleophilic substitution reaction where the ethoxide ion replaces the bromine atom.
Correct Answer: B — Nucleophilic substitution
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Q. What type of reaction occurs when 1-chlorobutane is treated with aqueous KOH? (2023)
-
A.
Elimination
-
B.
Substitution
-
C.
Addition
-
D.
Redox
Solution
When 1-chlorobutane is treated with aqueous KOH, a nucleophilic substitution reaction occurs, resulting in the formation of butanol.
Correct Answer: B — Substitution
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Q. What type of reaction occurs when 1-chloropropane reacts with aqueous KOH? (2023)
-
A.
Elimination
-
B.
Substitution
-
C.
Addition
-
D.
Redox
Solution
The reaction of 1-chloropropane with aqueous KOH leads to an elimination reaction, forming propene.
Correct Answer: B — Substitution
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Q. What type of reaction occurs when 1-chloropropane reacts with potassium cyanide? (2019)
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A.
Nucleophilic substitution
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B.
Electrophilic substitution
-
C.
Addition reaction
-
D.
Elimination reaction
Solution
The reaction between 1-chloropropane and potassium cyanide is a nucleophilic substitution reaction, resulting in the formation of propanenitrile.
Correct Answer: A — Nucleophilic substitution
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Q. What type of reaction occurs when 1-chloropropane reacts with sodium cyanide? (2023)
-
A.
Elimination
-
B.
Nucleophilic substitution
-
C.
Addition
-
D.
Redox
Solution
The reaction between 1-chloropropane and sodium cyanide is a nucleophilic substitution reaction where the cyanide ion replaces the chlorine atom.
Correct Answer: B — Nucleophilic substitution
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Q. What type of reaction occurs when 1-chloropropane reacts with sodium iodide in acetone? (2023)
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A.
Elimination
-
B.
Nucleophilic substitution
-
C.
Addition
-
D.
Redox
Solution
The reaction is a nucleophilic substitution (S_N2) where iodide ion replaces the chlorine atom.
Correct Answer: B — Nucleophilic substitution
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Q. What type of reaction occurs when 2-bromopropane is treated with aqueous KOH? (2023)
-
A.
Elimination
-
B.
Substitution
-
C.
Addition
-
D.
Redox
Solution
The reaction of 2-bromopropane with aqueous KOH leads to an elimination reaction, forming propene.
Correct Answer: A — Elimination
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Q. What type of reaction occurs when an alcohol is oxidized? (2023)
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A.
Reduction
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B.
Dehydration
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C.
Substitution
-
D.
Oxidation
Solution
Oxidation of alcohols involves the loss of hydrogen or the gain of oxygen, leading to the formation of aldehydes, ketones, or carboxylic acids.
Correct Answer: D — Oxidation
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Q. What type of reaction occurs when an alkene reacts with hydrogen? (2023) 2023
-
A.
Hydrolysis
-
B.
Hydrogenation
-
C.
Dehydration
-
D.
Oxidation
Solution
The reaction of an alkene with hydrogen is called hydrogenation.
Correct Answer: B — Hydrogenation
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Q. What type of reaction occurs when chlorobenzene is treated with magnesium in dry ether? (2019)
-
A.
Grignard reaction
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B.
Nucleophilic substitution
-
C.
Electrophilic substitution
-
D.
Reduction reaction
Solution
The reaction of chlorobenzene with magnesium in dry ether forms a Grignard reagent, which is a key step in organic synthesis.
Correct Answer: A — Grignard reaction
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Q. What type of reaction occurs when ethene is converted to ethane? (2020)
-
A.
Hydrogenation
-
B.
Dehydrogenation
-
C.
Halogenation
-
D.
Hydrolysis
Solution
The conversion of ethene to ethane involves the addition of hydrogen, which is known as hydrogenation.
Correct Answer: A — Hydrogenation
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Q. What type of reaction occurs when ethene reacts with bromine?
-
A.
Substitution
-
B.
Addition
-
C.
Elimination
-
D.
Oxidation
Solution
The reaction between ethene and bromine is an addition reaction, forming dibromoethane.
Correct Answer: B — Addition
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Q. What type of reaction occurs when haloalkanes react with aqueous KOH?
-
A.
Nucleophilic substitution
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B.
Elimination
-
C.
Addition
-
D.
Redox
Solution
Haloalkanes react with aqueous KOH primarily through nucleophilic substitution to form alcohols.
Correct Answer: A — Nucleophilic substitution
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Q. What type of reaction occurs when haloalkanes react with metals like magnesium?
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A.
Substitution
-
B.
Elimination
-
C.
Addition
-
D.
Grignard formation
Solution
The reaction of haloalkanes with metals like magnesium leads to Grignard formation, which is a key step in organic synthesis.
Correct Answer: D — Grignard formation
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Q. What type of reaction occurs when haloalkanes react with metals like zinc?
-
A.
Substitution
-
B.
Elimination
-
C.
Reduction
-
D.
Oxidation
Solution
The reaction of haloalkanes with metals like zinc is a reduction reaction, forming alkanes.
Correct Answer: C — Reduction
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Q. What type of reaction occurs when haloalkanes react with nucleophiles? (2020)
-
A.
Elimination
-
B.
Substitution
-
C.
Addition
-
D.
Redox
Solution
Haloalkanes typically undergo nucleophilic substitution reactions where the halogen is replaced by a nucleophile.
Correct Answer: B — Substitution
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Q. What type of reaction occurs when phenol reacts with bromine? (2023)
-
A.
Electrophilic substitution
-
B.
Nucleophilic substitution
-
C.
Addition
-
D.
Elimination
Solution
Phenol undergoes electrophilic substitution when it reacts with bromine, resulting in brominated phenols.
Correct Answer: A — Electrophilic substitution
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Q. What type of reproduction is primarily observed in bryophytes? (2020)
-
A.
Asexual reproduction
-
B.
Sexual reproduction
-
C.
Both asexual and sexual reproduction
-
D.
Vegetative reproduction
Solution
Bryophytes can reproduce both sexually, through gametes, and asexually, through fragmentation or budding.
Correct Answer: C — Both asexual and sexual reproduction
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Q. What type of reproduction is primarily observed in ferns? (2020)
-
A.
Asexual reproduction
-
B.
Sexual reproduction
-
C.
Vegetative reproduction
-
D.
All of the above
Solution
Ferns primarily reproduce sexually through spores, although they can also reproduce asexually.
Correct Answer: B — Sexual reproduction
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Q. What type of reproduction is primarily observed in flowering plants? (2022)
-
A.
Asexual reproduction
-
B.
Vegetative propagation
-
C.
Sexual reproduction
-
D.
Budding
Solution
Flowering plants primarily reproduce sexually through the formation of flowers and seeds.
Correct Answer: C — Sexual reproduction
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Q. What type of reproduction is primarily seen in algae? (2019)
-
A.
Asexual reproduction
-
B.
Sexual reproduction
-
C.
Both asexual and sexual reproduction
-
D.
Vegetative reproduction
Solution
Algae can reproduce both asexually and sexually, depending on environmental conditions.
Correct Answer: C — Both asexual and sexual reproduction
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Q. What type of reproduction is primarily seen in ferns? (2021)
-
A.
Asexual reproduction
-
B.
Sexual reproduction
-
C.
Both asexual and sexual reproduction
-
D.
Vegetative reproduction
Solution
Ferns primarily reproduce sexually through spores, although they can also reproduce asexually.
Correct Answer: B — Sexual reproduction
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Q. What type of reproduction occurs in flowering plants? (2021)
-
A.
Asexual reproduction
-
B.
Sexual reproduction
-
C.
Both asexual and sexual
-
D.
None of the above
Solution
Flowering plants can reproduce both sexually (through seeds) and asexually (through vegetative propagation).
Correct Answer: C — Both asexual and sexual
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Q. What type of reproduction occurs in hydra? (2023)
-
A.
Budding
-
B.
Binary fission
-
C.
Fragmentation
-
D.
Sexual reproduction
Solution
Hydra reproduces asexually by budding, where a new individual develops from an outgrowth of the parent.
Correct Answer: A — Budding
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