Major Competitive Exams
Q. What is the primary advantage of having a diverse team? (2023)
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A.
Easier decision-making
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B.
Increased creativity and innovation
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C.
Faster completion of tasks
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D.
Uniformity in thought
Solution
A diverse team brings together varied perspectives, which can lead to increased creativity and innovation in problem-solving.
Correct Answer: B — Increased creativity and innovation
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Q. What is the primary advantage of sexual reproduction? (2021)
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A.
Faster reproduction
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B.
Genetic diversity
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C.
No need for a mate
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D.
Lower energy requirement
Solution
Sexual reproduction leads to genetic diversity, which can enhance survival in changing environments.
Correct Answer: B — Genetic diversity
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Q. What is the primary advantage of using digital signals over analog signals in communication systems?
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A.
Higher bandwidth
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B.
Less susceptibility to noise
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C.
Easier to modulate
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D.
Lower power consumption
Solution
Digital signals are less susceptible to noise, making them more reliable for communication compared to analog signals.
Correct Answer: B — Less susceptibility to noise
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Q. What is the primary advantage of using hybrid sets in data analysis?
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A.
They simplify complex data structures.
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B.
They eliminate redundancy in data.
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C.
They allow for the combination of diverse data types.
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D.
They are easier to visualize.
Solution
Hybrid sets enable the combination of diverse data types, making them useful for comprehensive data analysis.
Correct Answer: C — They allow for the combination of diverse data types.
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Q. What is the primary advantage of using hybrid sets in data organization?
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A.
They simplify complex data relationships.
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B.
They eliminate the need for data analysis.
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C.
They can only store numerical data.
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D.
They are always smaller than traditional sets.
Solution
Hybrid sets help in simplifying complex relationships by allowing for the combination of different types of data.
Correct Answer: A — They simplify complex data relationships.
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Q. What is the primary advantage of using the octal system in computing?
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A.
It simplifies binary representation.
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B.
It is easier for humans to read than binary.
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C.
It is the only system used in programming.
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D.
It is more efficient than hexadecimal.
Solution
The octal system simplifies binary representation by grouping bits into sets of three.
Correct Answer: A — It simplifies binary representation.
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Q. What is the primary aim of the National Rural Livelihood Mission (NRLM)? (2011)
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A.
To provide free education
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B.
To promote self-employment and organization of rural poor
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C.
To enhance agricultural productivity
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D.
To provide health insurance
Solution
The primary aim of the NRLM is to promote self-employment and organize the rural poor into self-help groups.
Correct Answer: B — To promote self-employment and organization of rural poor
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Q. What is the primary application of nuclear fusion in stars?
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A.
Energy production
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B.
Nuclear weapons
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C.
Radioactive dating
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D.
Medical imaging
Solution
Nuclear fusion in stars primarily serves as a source of energy production, converting hydrogen into helium and releasing vast amounts of energy.
Correct Answer: A — Energy production
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Q. What is the primary application of recombinant DNA technology in medicine? (2020)
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A.
Production of insulin
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B.
Gene therapy
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C.
Vaccines
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D.
All of the above
Solution
Recombinant DNA technology is used in various medical applications including the production of insulin, gene therapy, and vaccines.
Correct Answer: D — All of the above
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Q. What is the primary argument made by the author regarding economic inequalities?
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A.
They are the most significant type of inequality.
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B.
They can be addressed through education.
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C.
They are often ignored in policy discussions.
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D.
They are a result of individual choices.
Solution
The author emphasizes that economic inequalities are a critical issue that deserves attention in policy discussions.
Correct Answer: A — They are the most significant type of inequality.
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Q. What is the primary argument presented in the passage regarding climate change?
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A.
Climate change is a natural phenomenon.
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B.
Human activities are the main cause of climate change.
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C.
Climate change has no significant impact on biodiversity.
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D.
The effects of climate change are reversible.
Solution
The passage emphasizes that human activities, particularly the burning of fossil fuels, are the primary drivers of climate change.
Correct Answer: B — Human activities are the main cause of climate change.
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Q. What is the primary assumption of the kinetic theory of gases regarding the motion of gas molecules?
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A.
Gas molecules are stationary.
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B.
Gas molecules move in straight lines until they collide.
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C.
Gas molecules are always in a state of vibration.
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D.
Gas molecules have a fixed volume.
Solution
The kinetic theory assumes that gas molecules move in straight lines until they collide with each other or the walls of the container.
Correct Answer: B — Gas molecules move in straight lines until they collide.
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Q. What is the primary bond type in polymers?
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A.
Ionic bonds
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B.
Covalent bonds
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C.
Metallic bonds
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D.
Hydrogen bonds
Solution
Covalent bonds are the primary bond type in polymers, linking monomers together.
Correct Answer: B — Covalent bonds
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Q. What is the primary cause of a zero error? (2019)
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A.
Instrument wear and tear
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B.
Incorrect calibration
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C.
Environmental factors
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D.
User error
Solution
A zero error occurs when an instrument does not read zero when it should, often due to incorrect calibration.
Correct Answer: B — Incorrect calibration
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Q. What is the primary cause of biodiversity loss worldwide? (2020)
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A.
Climate change
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B.
Habitat destruction
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C.
Pollution
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D.
Overexploitation
Solution
Habitat destruction is the primary cause of biodiversity loss, as it leads to the loss of species and ecosystems.
Correct Answer: B — Habitat destruction
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Q. What is the primary cause of buoyancy in fluids?
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A.
Surface tension
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B.
Pressure difference
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C.
Viscosity
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D.
Density
Solution
Buoyancy is primarily caused by the pressure difference between the top and bottom of an object submerged in a fluid.
Correct Answer: B — Pressure difference
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Q. What is the primary cause of capillary action in liquids?
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A.
Cohesion
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B.
Adhesion
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C.
Viscosity
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D.
Density
Solution
Capillary action is primarily caused by adhesion, where the liquid molecules are attracted to the surface of the solid.
Correct Answer: B — Adhesion
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Q. What is the primary cause of global warming?
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A.
Deforestation
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B.
Greenhouse gas emissions
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C.
Ozone depletion
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D.
Acid rain
Solution
Greenhouse gas emissions, particularly CO2, are the primary cause of global warming.
Correct Answer: B — Greenhouse gas emissions
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Q. What is the primary cause of ocean acidification?
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A.
Plastic pollution
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B.
Increased CO2 absorption
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C.
Heavy metal contamination
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D.
Thermal pollution
Solution
Ocean acidification is primarily caused by the increased absorption of CO2 from the atmosphere into ocean waters.
Correct Answer: B — Increased CO2 absorption
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Q. What is the primary cause of ocean currents?
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A.
Wind patterns
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B.
Earth's rotation
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C.
Temperature differences
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D.
Salinity differences
Solution
The primary cause of ocean currents is wind patterns, which drive the movement of water across the surface.
Correct Answer: A — Wind patterns
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Q. What is the primary cause of surface tension in liquids?
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A.
Cohesive forces
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B.
Adhesive forces
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C.
Gravitational forces
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D.
Electromagnetic forces
Solution
Surface tension is primarily caused by cohesive forces between liquid molecules, which create a 'skin' at the surface.
Correct Answer: A — Cohesive forces
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Q. What is the primary cause of the greenhouse effect?
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A.
Ozone depletion
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B.
Increased solar radiation
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C.
Trapping of heat by greenhouse gases
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D.
Deforestation
Solution
The greenhouse effect is primarily caused by the trapping of heat in the Earth's atmosphere by greenhouse gases.
Correct Answer: C — Trapping of heat by greenhouse gases
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Q. What is the primary cause of the phenomenon known as capillarity?
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A.
Cohesion
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B.
Adhesion
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C.
Viscosity
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D.
Density
Solution
Capillarity is primarily caused by adhesion, which is the attraction between the liquid molecules and the surface of the solid.
Correct Answer: B — Adhesion
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Q. What is the primary cause of the phenomenon of buoyancy?
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A.
Surface tension
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B.
Pressure difference
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C.
Viscosity
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D.
Density
Solution
Buoyancy is caused by the pressure difference between the top and bottom of an object submerged in a fluid.
Correct Answer: B — Pressure difference
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Q. What is the primary cause of the phenomenon of capillarity?
-
A.
Cohesion
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B.
Adhesion
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C.
Viscosity
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D.
Density
Solution
Capillarity is primarily caused by adhesion, which is the attraction between the liquid molecules and the surface of the solid.
Correct Answer: B — Adhesion
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Q. What is the primary cause of tides on Earth? (2019)
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A.
Wind
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B.
Earth's rotation
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C.
Gravitational pull of the moon
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D.
Ocean currents
Solution
The primary cause of tides on Earth is the gravitational pull of the moon.
Correct Answer: C — Gravitational pull of the moon
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Q. What is the primary cause of tuberculosis? (2020)
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A.
Bacteria
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B.
Virus
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C.
Fungi
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D.
Protozoa
Solution
Tuberculosis is primarily caused by the bacterium Mycobacterium tuberculosis.
Correct Answer: A — Bacteria
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Q. What is the primary cause of viscosity in fluids?
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A.
Molecular interactions
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B.
Temperature
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C.
Pressure
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D.
Density
Solution
Viscosity arises primarily from molecular interactions within the fluid, which resist flow.
Correct Answer: A — Molecular interactions
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Q. What is the primary characteristic of a K-selected species? (2023)
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A.
High reproductive rate
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B.
Short lifespan
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C.
High parental care
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D.
Rapid growth
Solution
K-selected species typically exhibit high parental care and invest more resources in fewer offspring.
Correct Answer: C — High parental care
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Q. What is the primary characteristic of adsorption? (2023)
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A.
It is a bulk phenomenon.
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B.
It involves a chemical reaction.
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C.
It is a surface phenomenon.
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D.
It requires high temperature.
Solution
Adsorption is a surface phenomenon where molecules adhere to the surface of a solid or liquid.
Correct Answer: C — It is a surface phenomenon.
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