Q. What type of reaction occurs when haloalkanes react with metals like magnesium?
-
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
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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)
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A.
Asexual reproduction
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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 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 sponges? (2020)
-
A.
Asexual reproduction only
-
B.
Sexual reproduction only
-
C.
Both asexual and sexual reproduction
-
D.
None of the above
Solution
Sponges can reproduce both asexually through budding and sexually by producing gametes.
Correct Answer: C — Both asexual and sexual reproduction
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Q. What type of root system is found in monocots? (2021)
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A.
Tap root system
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B.
Fibrous root system
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C.
Adventitious root system
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D.
None of the above
Solution
Monocots typically have a fibrous root system, which consists of many thin roots.
Correct Answer: B — Fibrous root system
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Q. What type of solid is diamond classified as? (2022)
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A.
Metallic solid
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B.
Ionic solid
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C.
Covalent network solid
-
D.
Molecular solid
Solution
Diamond is classified as a covalent network solid due to its strong covalent bonds forming a three-dimensional network.
Correct Answer: C — Covalent network solid
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Q. What type of structure do most natural polymers have?
-
A.
Linear
-
B.
Branched
-
C.
Cross-linked
-
D.
Network
Solution
Most natural polymers, like cellulose, have a linear structure.
Correct Answer: A — Linear
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Q. What type of sugar is ribose?
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A.
Monosaccharide
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B.
Disaccharide
-
C.
Polysaccharide
-
D.
Oligosaccharide
Solution
Ribose is a monosaccharide, a simple sugar that is a component of RNA.
Correct Answer: A — Monosaccharide
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Q. What type of symmetry do most animals in the phylum Cnidaria exhibit? (2023)
-
A.
Bilateral symmetry
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B.
Radial symmetry
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C.
Asymmetry
-
D.
Spherical symmetry
Solution
Most cnidarians exhibit radial symmetry, allowing them to interact with their environment from all directions.
Correct Answer: B — Radial symmetry
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Q. What type of symmetry is exhibited by organisms in the phylum Cnidaria? (2019)
-
A.
Bilateral symmetry
-
B.
Radial symmetry
-
C.
Asymmetry
-
D.
Spherical symmetry
Solution
Organisms in the phylum Cnidaria, such as jellyfish and corals, exhibit radial symmetry.
Correct Answer: B — Radial symmetry
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Q. What type of symmetry is exhibited by organisms in the phylum Platyhelminthes? (2022)
-
A.
Bilateral symmetry
-
B.
Radial symmetry
-
C.
Asymmetry
-
D.
Spherical symmetry
Solution
Platyhelminthes, or flatworms, exhibit bilateral symmetry, which is a key characteristic of this phylum.
Correct Answer: A — Bilateral symmetry
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Q. What type of symmetry is exhibited by organisms in the phylum Porifera? (2021)
-
A.
Bilateral symmetry
-
B.
Radial symmetry
-
C.
Asymmetry
-
D.
Spherical symmetry
Solution
Organisms in the phylum Porifera, such as sponges, exhibit asymmetry.
Correct Answer: C — Asymmetry
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Q. What type of tissue is responsible for the transport of water in plants? (2019)
-
A.
Phloem
-
B.
Xylem
-
C.
Parenchyma
-
D.
Collenchyma
Solution
Xylem is the type of tissue responsible for the transport of water and minerals from the roots to the rest of the plant.
Correct Answer: B — Xylem
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Q. What type of wave is characterized by particle motion being parallel to wave motion? (2023)
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A.
Transverse wave
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B.
Longitudinal wave
-
C.
Surface wave
-
D.
Standing wave
Solution
In a longitudinal wave, the particle motion is parallel to the direction of wave propagation.
Correct Answer: B — Longitudinal wave
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Q. What type of wave is produced when a vibrating tuning fork is placed on a table? (2022)
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A.
Transverse wave
-
B.
Longitudinal wave
-
C.
Surface wave
-
D.
Electromagnetic wave
Solution
A vibrating tuning fork produces longitudinal waves in the air, which then can create transverse waves in the surface of the table.
Correct Answer: B — Longitudinal wave
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Q. Which alcohol is commonly known as rubbing alcohol?
-
A.
Ethanol
-
B.
Isopropanol
-
C.
Methanol
-
D.
Butanol
Solution
Isopropanol, or 2-Propanol, is commonly referred to as rubbing alcohol.
Correct Answer: B — Isopropanol
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Q. Which alcohol is used as an antifreeze agent? (2022)
-
A.
Ethanol
-
B.
Methanol
-
C.
Isopropanol
-
D.
Butanol
Solution
Methanol is commonly used as an antifreeze agent due to its low freezing point.
Correct Answer: B — Methanol
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Q. Which alcohol is used as an antifreeze? (2022)
-
A.
Methanol
-
B.
Ethanol
-
C.
Isopropanol
-
D.
Butanol
Solution
Methanol is commonly used as an antifreeze due to its low freezing point.
Correct Answer: A — Methanol
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Q. Which alkaline earth metal has the highest melting point? (2022)
-
A.
Beryllium
-
B.
Magnesium
-
C.
Calcium
-
D.
Barium
Solution
Beryllium has the highest melting point among the alkaline earth metals.
Correct Answer: A — Beryllium
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Q. Which alkaline earth metal is known for its use in the production of lightweight alloys? (2023)
-
A.
Calcium
-
B.
Barium
-
C.
Magnesium
-
D.
Strontium
Solution
Magnesium is widely used in the production of lightweight alloys due to its low density.
Correct Answer: C — Magnesium
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Q. Which alkaline earth metal is used in fireworks for its bright flame? (2021)
-
A.
Barium
-
B.
Calcium
-
C.
Strontium
-
D.
Magnesium
Solution
Strontium (Sr) is used in fireworks to produce a bright red flame.
Correct Answer: C — Strontium
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Q. Which alkaline earth metal is used in fireworks for producing a bright white light? (2023)
-
A.
Barium
-
B.
Calcium
-
C.
Strontium
-
D.
Magnesium
Solution
Strontium is used in fireworks to produce a bright red flame.
Correct Answer: C — Strontium
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Q. Which amine is a strong base due to steric hindrance? (2022)
-
A.
Methylamine
-
B.
Ethylamine
-
C.
Tert-butylamine
-
D.
Aniline
Solution
Tert-butylamine is a strong base due to steric hindrance that prevents protonation, making it more stable.
Correct Answer: C — Tert-butylamine
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Q. Which amine is known for its fishy odor?
-
A.
Methylamine
-
B.
Ethylamine
-
C.
Trimethylamine
-
D.
Aniline
Solution
Trimethylamine is known for its strong fishy odor, often associated with decaying fish.
Correct Answer: C — Trimethylamine
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