Q. What is the work done by an ideal gas during an isobaric expansion? (2019)
Solution
The work done by an ideal gas during an isobaric (constant pressure) expansion is given by W = PΔV.
Correct Answer: A — PΔV
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Q. What is the work done on a gas during an isothermal compression? (2019)
-
A.
Positive
-
B.
Negative
-
C.
Zero
-
D.
Depends on the volume
Solution
The work done on a gas during isothermal compression is positive, as work is done on the gas to compress it.
Correct Answer: A — Positive
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Q. What is the work done when a force of 15 N moves an object 3 m in the direction of the force? (2021)
-
A.
45 J
-
B.
30 J
-
C.
15 J
-
D.
60 J
Solution
Work Done (W) = Force * Distance = 15 N * 3 m = 45 J.
Correct Answer: A — 45 J
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Q. What is the Young's modulus of a material if a stress of 200 MPa produces a strain of 0.01? (2021)
-
A.
2000 MPa
-
B.
20 MPa
-
C.
200 MPa
-
D.
2 MPa
Solution
Young's modulus (E) = Stress / Strain = 200 MPa / 0.01 = 20000 MPa = 2000 MPa.
Correct Answer: A — 2000 MPa
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Q. What role does phosphorus play in plants? (2021)
-
A.
Energy transfer
-
B.
Water absorption
-
C.
Cell wall formation
-
D.
Photosynthesis
Solution
Phosphorus is vital for energy transfer through ATP and is also important for nucleic acid synthesis.
Correct Answer: A — Energy transfer
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Q. What structure forms during prophase to help separate chromosomes? (2022)
-
A.
Centromere
-
B.
Spindle fibers
-
C.
Chromatin
-
D.
Nuclear envelope
Solution
Spindle fibers form during prophase to help separate the chromosomes during mitosis.
Correct Answer: B — Spindle fibers
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Q. What structure regulates the entry and exit of substances in a cell? (2021)
-
A.
Cell Wall
-
B.
Nucleus
-
C.
Plasma Membrane
-
D.
Cytoplasm
Solution
The plasma membrane regulates the entry and exit of substances in and out of the cell, maintaining homeostasis.
Correct Answer: C — Plasma Membrane
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Q. What term describes the process by which unrelated organisms evolve similar traits? (1970)
-
A.
Convergent Evolution
-
B.
Divergent Evolution
-
C.
Adaptive Radiation
-
D.
Co-evolution
Solution
Convergent evolution occurs when unrelated organisms evolve similar traits due to similar environmental pressures.
Correct Answer: A — Convergent Evolution
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Q. What term describes the role and position a species has in its environment? (2020)
-
A.
Habitat
-
B.
Niche
-
C.
Biome
-
D.
Ecosystem
Solution
The niche of a species is its role and position in its environment, including all interactions with biotic and abiotic factors.
Correct Answer: B — Niche
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Q. What term describes the role of an organism in its ecosystem? (2022)
-
A.
Habitat
-
B.
Niche
-
C.
Biome
-
D.
Community
Solution
Niche refers to the role and position a species has in its environment, including all interactions with biotic and abiotic factors.
Correct Answer: B — Niche
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Q. What term describes the role of an organism in its environment? (2019)
-
A.
Habitat
-
B.
Niche
-
C.
Biome
-
D.
Community
Solution
The niche of an organism refers to its role and position in its environment, including all interactions with biotic and abiotic factors.
Correct Answer: B — Niche
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Q. What term describes the variety of life in a particular habitat or ecosystem? (2022)
-
A.
Genetic diversity
-
B.
Species diversity
-
C.
Ecosystem diversity
-
D.
Biodiversity
Solution
Species diversity refers to the variety of life in a particular habitat or ecosystem.
Correct Answer: B — Species diversity
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Q. What term describes the variety of life in the world or in a particular habitat? (2021)
-
A.
Ecosystem
-
B.
Biodiversity
-
C.
Population
-
D.
Community
Solution
Biodiversity refers to the variety of life in the world or in a particular habitat.
Correct Answer: B — Biodiversity
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Q. What term is used to describe the scientific study of living organisms? (2022)
-
A.
Biology
-
B.
Zoology
-
C.
Botany
-
D.
Ecology
Solution
Biology is the scientific study of living organisms, encompassing various sub-disciplines such as zoology and botany.
Correct Answer: A — Biology
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Q. What term is used to describe the variety of life in the world or in a particular habitat or ecosystem? (2022)
-
A.
Biodiversity
-
B.
Ecology
-
C.
Biology
-
D.
Genetics
Solution
Biodiversity refers to the variety of life in the world or in a particular habitat or ecosystem.
Correct Answer: A — Biodiversity
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Q. What type of adsorption is characterized by a low heat of adsorption, typically less than 40 kJ/mol? (2023)
-
A.
Physisorption
-
B.
Chemisorption
-
C.
Multilayer adsorption
-
D.
Surface reaction
Solution
Physisorption is characterized by a low heat of adsorption, typically less than 40 kJ/mol, due to weak van der Waals forces.
Correct Answer: A — Physisorption
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Q. What type of amine is formed by the reaction of ammonia with an alkyl halide? (2019)
-
A.
Tertiary amine
-
B.
Primary amine
-
C.
Secondary amine
-
D.
Quaternary ammonium salt
Solution
The reaction of ammonia with an alkyl halide primarily forms a primary amine.
Correct Answer: B — Primary amine
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Q. What type of amine is formed when ammonia reacts with an alkyl halide? (2022)
-
A.
Primary amine
-
B.
Secondary amine
-
C.
Tertiary amine
-
D.
Quaternary ammonium salt
Solution
The reaction of ammonia with an alkyl halide initially forms a primary amine.
Correct Answer: A — Primary amine
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Q. What type of biomolecule are enzymes? (2019)
-
A.
Carbohydrates
-
B.
Proteins
-
C.
Lipids
-
D.
Nucleic acids
Solution
Enzymes are primarily proteins that catalyze biochemical reactions.
Correct Answer: B — Proteins
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Q. What type of biomolecule is DNA? (2022)
-
A.
Protein
-
B.
Carbohydrate
-
C.
Lipid
-
D.
Nucleic acid
Solution
DNA is classified as a nucleic acid, which stores and transmits genetic information.
Correct Answer: D — Nucleic acid
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Q. What type of bond is formed between two atoms that share electrons? (2022)
-
A.
Ionic bond
-
B.
Covalent bond
-
C.
Metallic bond
-
D.
Hydrogen bond
Solution
A covalent bond is formed when two atoms share electrons.
Correct Answer: B — Covalent bond
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Q. What type of bond is present in alkynes? (2022)
-
A.
Single bond
-
B.
Double bond
-
C.
Triple bond
-
D.
Quadruple bond
Solution
Alkynes contain at least one triple bond between carbon atoms.
Correct Answer: C — Triple bond
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Q. What type of bond is primarily found in alkenes? (2023)
-
A.
Single bond
-
B.
Double bond
-
C.
Triple bond
-
D.
Ionic bond
Solution
Alkenes are characterized by the presence of at least one double bond between carbon atoms.
Correct Answer: B — Double bond
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Q. What type of bond is primarily found in organic compounds? (2023)
-
A.
Ionic bonds
-
B.
Covalent bonds
-
C.
Metallic bonds
-
D.
Hydrogen bonds
Solution
Organic compounds primarily consist of covalent bonds formed between carbon and other atoms.
Correct Answer: B — Covalent bonds
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Q. What type of bond links amino acids together? (2023)
-
A.
Ionic bond
-
B.
Hydrogen bond
-
C.
Peptide bond
-
D.
Disulfide bond
Solution
A peptide bond links amino acids in proteins.
Correct Answer: C — Peptide bond
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Q. What type of carbohydrate is cellulose? (2023)
-
A.
Monosaccharide
-
B.
Disaccharide
-
C.
Oligosaccharide
-
D.
Polysaccharide
Solution
Cellulose is a polysaccharide that provides structural support in plant cell walls.
Correct Answer: D — Polysaccharide
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Q. What type of charge carriers are predominant in n-type semiconductors? (2020)
-
A.
Holes
-
B.
Electrons
-
C.
Protons
-
D.
Neutrons
Solution
In n-type semiconductors, electrons are the predominant charge carriers.
Correct Answer: B — Electrons
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Q. What type of charge carriers are present in n-type semiconductors? (2019)
-
A.
Holes
-
B.
Electrons
-
C.
Protons
-
D.
Neutrons
Solution
In n-type semiconductors, the majority charge carriers are electrons.
Correct Answer: B — Electrons
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Q. What type of connective tissue connects muscles to bones? (2021)
-
A.
Tendons
-
B.
Ligaments
-
C.
Cartilage
-
D.
Adipose tissue
Solution
Tendons are connective tissues that connect muscles to bones, allowing for movement.
Correct Answer: A — Tendons
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Q. What type of connective tissue stores fat in the body? (2021)
-
A.
Adipose tissue
-
B.
Cartilage
-
C.
Bone
-
D.
Blood
Solution
Adipose tissue is a type of connective tissue that stores fat and provides insulation and cushioning.
Correct Answer: A — Adipose tissue
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