Q. What is the primary method of reproduction in bacteria? (2021)
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A.
Binary fission
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B.
Budding
-
C.
Fragmentation
-
D.
Sexual reproduction
Solution
Bacteria primarily reproduce asexually through binary fission, where a single cell divides into two identical cells.
Correct Answer: A — Binary fission
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Q. What is the primary mode of nutrition in the kingdom Animalia? (2023)
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A.
Autotrophic
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B.
Heterotrophic
-
C.
Saprophytic
-
D.
Parasitic
Solution
The primary mode of nutrition in the kingdom Animalia is heterotrophic.
Correct Answer: B — Heterotrophic
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Q. What is the primary mode of nutrition in the kingdom Plantae? (2022)
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A.
Heterotrophic
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B.
Saprophytic
-
C.
Autotrophic
-
D.
Parasitic
Solution
Plants primarily exhibit autotrophic nutrition through photosynthesis.
Correct Answer: C — Autotrophic
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Q. What is the primary mode of reproduction in angiosperms? (2023)
-
A.
Asexual reproduction
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B.
Budding
-
C.
Fission
-
D.
Sexual reproduction
Solution
Angiosperms primarily reproduce through sexual reproduction, involving flowers and seeds.
Correct Answer: D — Sexual reproduction
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Q. What is the primary mode of reproduction in ferns? (2023)
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A.
Asexual reproduction
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B.
Sexual reproduction
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C.
Vegetative propagation
-
D.
Budding
Solution
Ferns primarily reproduce through sexual reproduction, producing spores.
Correct Answer: B — Sexual reproduction
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Q. What is the primary mode of reproduction in unicellular organisms? (2020)
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A.
Asexual reproduction
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B.
Sexual reproduction
-
C.
Binary fission
-
D.
Budding
Solution
Unicellular organisms primarily reproduce asexually, often through processes like binary fission.
Correct Answer: A — Asexual reproduction
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Q. What is the primary muscle involved in the process of breathing? (2021)
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A.
Diaphragm
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B.
Intercostal muscles
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C.
Abdominal muscles
-
D.
Pectoral muscles
Solution
The diaphragm is the primary muscle that contracts and relaxes to facilitate breathing.
Correct Answer: A — Diaphragm
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Q. What is the primary oxidation state of carbon in carbon dioxide (CO2)? (2020)
Solution
In carbon dioxide, carbon has an oxidation state of +4.
Correct Answer: B — +4
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Q. What is the primary oxidation state of iron in FeCl3? (2023)
Solution
In FeCl3, iron (Fe) has a primary oxidation state of +3.
Correct Answer: B — +3
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Q. What is the primary oxidation state of lead in lead(II) oxide (PbO)? (2019)
Solution
In lead(II) oxide, lead has an oxidation state of +2.
Correct Answer: A — +2
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Q. What is the primary oxidation state of nitrogen in ammonia (NH3)? (2021)
Solution
In ammonia, nitrogen has an oxidation state of -3.
Correct Answer: A — -3
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Q. What is the primary oxidation state of nitrogen in nitric acid (HNO3)? (2023)
Solution
In nitric acid, nitrogen has an oxidation state of +5.
Correct Answer: C — +5
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Q. What is the primary oxidation state of vanadium in V2O5? (2023)
Solution
In V2O5, vanadium has an oxidation state of +5.
Correct Answer: C — +5
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Q. What is the primary pollutant in smog? (2021)
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A.
Carbon monoxide
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B.
Sulfur dioxide
-
C.
Nitrogen oxides
-
D.
Particulate matter
Solution
Particulate matter is a primary pollutant in smog, contributing to air quality issues.
Correct Answer: D — Particulate matter
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Q. What is the primary process by which energy enters an ecosystem? (2022)
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A.
Respiration
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B.
Photosynthesis
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C.
Decomposition
-
D.
Transpiration
Solution
Photosynthesis is the primary process by which energy from sunlight is converted into chemical energy by plants.
Correct Answer: B — Photosynthesis
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Q. What is the primary producer in a freshwater ecosystem? (2022)
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A.
Fish
-
B.
Algae
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C.
Fungi
-
D.
Bacteria
Solution
Algae are the primary producers in a freshwater ecosystem as they perform photosynthesis.
Correct Answer: B — Algae
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Q. What is the primary producer in a terrestrial ecosystem? (2019)
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A.
Herbivores
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B.
Carnivores
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C.
Plants
-
D.
Decomposers
Solution
Plants are the primary producers in terrestrial ecosystems as they convert sunlight into energy through photosynthesis.
Correct Answer: C — Plants
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Q. What is the primary product of nuclear fission? (2019)
-
A.
Energy
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B.
Neutrons
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C.
Protons
-
D.
Alpha particles
Solution
The primary product of nuclear fission is energy, along with neutrons and smaller nuclei.
Correct Answer: A — Energy
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Q. What is the primary product of the electrolysis of water? (2023)
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A.
Hydrogen
-
B.
Oxygen
-
C.
Hydrogen Peroxide
-
D.
Ozone
Solution
The primary products of the electrolysis of water are hydrogen and oxygen gases.
Correct Answer: A — Hydrogen
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Q. What is the primary product of the fission of Uranium-235? (2019)
-
A.
Helium
-
B.
Neutrons
-
C.
Barium and Krypton
-
D.
Carbon
Solution
The fission of Uranium-235 primarily produces Barium and Krypton along with additional neutrons.
Correct Answer: C — Barium and Krypton
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Q. What is the primary product of the fusion of hydrogen nuclei in stars? (2022)
-
A.
Helium
-
B.
Carbon
-
C.
Oxygen
-
D.
Nitrogen
Solution
The primary product of hydrogen fusion in stars is helium, which occurs through the proton-proton chain reaction.
Correct Answer: A — Helium
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Q. What is the primary product of the fusion of hydrogen nuclei? (2022)
-
A.
Helium
-
B.
Carbon
-
C.
Oxygen
-
D.
Deuterium
Solution
The primary product of the fusion of hydrogen nuclei (protons) is helium, along with the release of energy.
Correct Answer: A — Helium
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Q. What is the primary product of the reaction between hydrogen and chlorine? (2019)
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A.
Hydrochloric acid
-
B.
Hydrogen chloride
-
C.
Chlorine gas
-
D.
Water
Solution
The primary product of the reaction between hydrogen and chlorine is hydrogen chloride (HCl).
Correct Answer: B — Hydrogen chloride
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Q. What is the primary product of the thermal decomposition of calcium carbonate? (2019)
-
A.
Calcium oxide
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B.
Calcium hydroxide
-
C.
Calcium bicarbonate
-
D.
Calcium chloride
Solution
The thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2).
Correct Answer: A — Calcium oxide
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Q. What is the primary product when aluminum reacts with hydrochloric acid? (2020)
-
A.
AlCl3
-
B.
H2
-
C.
Al(OH)3
-
D.
Al2Cl6
Solution
When aluminum reacts with hydrochloric acid, hydrogen gas (H2) is produced along with aluminum chloride (AlCl3).
Correct Answer: B — H2
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Q. What is the primary product when calcium reacts with oxygen? (2022)
-
A.
Calcium oxide
-
B.
Calcium hydroxide
-
C.
Calcium carbonate
-
D.
Calcium peroxide
Solution
Calcium reacts with oxygen to form calcium oxide (CaO).
Correct Answer: A — Calcium oxide
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Q. What is the primary product when lithium reacts with nitrogen? (2022)
-
A.
Lithium nitride
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B.
Lithium oxide
-
C.
Lithium hydroxide
-
D.
Lithium carbonate
Solution
Lithium reacts with nitrogen to form lithium nitride (Li3N).
Correct Answer: A — Lithium nitride
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Q. What is the primary product when potassium permanganate (KMnO4) is reduced in acidic medium? (2019)
-
A.
MnO2
-
B.
Mn2+
-
C.
MnO4-
-
D.
KMnO4
Solution
In acidic medium, potassium permanganate (KMnO4) is reduced to Mn2+.
Correct Answer: B — Mn2+
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Q. What is the primary purpose of petals in a flower? (2023)
-
A.
To produce seeds
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B.
To attract pollinators
-
C.
To support the flower
-
D.
To protect the ovary
Solution
Petals are often brightly colored and serve to attract pollinators to the flower.
Correct Answer: B — To attract pollinators
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Q. What is the primary purpose of reproduction in organisms? (2020)
-
A.
To increase genetic diversity
-
B.
To maintain homeostasis
-
C.
To produce energy
-
D.
To ensure survival of the species
Solution
Reproduction ensures the continuation of a species by producing offspring.
Correct Answer: D — To ensure survival of the species
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