Q. Which of the following is a common use of phenol? (2022)
-
A.
Disinfectant
-
B.
Food preservative
-
C.
Flavoring agent
-
D.
Coloring agent
Solution
Phenol is widely used as a disinfectant due to its antimicrobial properties.
Correct Answer:
A
— Disinfectant
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Q. Which of the following is a common use of polyethylene?
-
A.
Insulation for wires
-
B.
Packaging materials
-
C.
Automobile parts
-
D.
Textiles
Solution
Polyethylene is widely used in packaging materials due to its flexibility and durability.
Correct Answer:
B
— Packaging materials
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Q. Which of the following is a common use of polyvinyl chloride (PVC)?
-
A.
Food packaging
-
B.
Electrical insulation
-
C.
Clothing
-
D.
Automobile tires
Solution
Polyvinyl chloride (PVC) is commonly used in electrical insulation and construction materials.
Correct Answer:
B
— Electrical insulation
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Q. Which of the following is a common use of probiotics? (2023)
-
A.
To treat infections
-
B.
To improve gut health
-
C.
To cause diseases
-
D.
To produce antibiotics
Solution
Probiotics are beneficial bacteria that help improve gut health and can prevent infections.
Correct Answer:
B
— To improve gut health
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Q. Which of the following is a common use of PVC?
-
A.
Clothing
-
B.
Pipes
-
C.
Food packaging
-
D.
Adhesives
Solution
PVC (Polyvinyl Chloride) is commonly used in the production of pipes due to its durability and resistance to corrosion.
Correct Answer:
B
— Pipes
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Q. Which of the following is a common use of silicon?
-
A.
Fertilizers
-
B.
Semiconductors
-
C.
Explosives
-
D.
Dyes
Solution
Silicon is widely used in semiconductors.
Correct Answer:
B
— Semiconductors
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Q. Which of the following is a common use of sodium bicarbonate in everyday life?
-
A.
Baking
-
B.
Cleaning
-
C.
Pest control
-
D.
All of the above
Solution
Sodium bicarbonate, or baking soda, is used in baking, cleaning, and even pest control.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common use of sodium bicarbonate? (2023)
-
A.
Baking
-
B.
Cleaning
-
C.
Antacid
-
D.
All of the above
Solution
Sodium bicarbonate is used in baking as a leavening agent, in cleaning products, and as an antacid for relieving heartburn.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common use of sulfur? (2022)
-
A.
Fertilizers
-
B.
Explosives
-
C.
Rubber production
-
D.
All of the above
Solution
Sulfur is used in fertilizers, explosives, and rubber production.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common use of transition metals?
-
A.
Insulators
-
B.
Catalysts
-
C.
Noble gases
-
D.
Non-metals
Solution
Transition metals are commonly used as catalysts in various chemical reactions.
Correct Answer:
B
— Catalysts
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Q. Which of the following is a common use of vinegar in households?
-
A.
Cleaning agent
-
B.
Food preservative
-
C.
Flavoring agent
-
D.
All of the above
Solution
Vinegar is used in households for cleaning, preserving food, and as a flavoring agent.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common use of vinegar?
-
A.
Preservative
-
B.
Cleaning agent
-
C.
Flavoring agent
-
D.
All of the above
Solution
Vinegar is used as a preservative, cleaning agent, and flavoring agent.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common use of yeast in food production? (2019)
-
A.
Making cheese
-
B.
Making bread
-
C.
Making vinegar
-
D.
Making yogurt
Solution
Yeast is commonly used in bread making due to its ability to ferment sugars and produce carbon dioxide.
Correct Answer:
B
— Making bread
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Q. Which of the following is a common vector used in gene cloning? (2019)
-
A.
Plasmids
-
B.
Ribosomes
-
C.
Chromosomes
-
D.
Nucleotides
Solution
Plasmids are commonly used as vectors in gene cloning because they can replicate independently within a host cell.
Correct Answer:
A
— Plasmids
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Q. Which of the following is a common vector used in genetic engineering? (2019)
-
A.
Plasmids
-
B.
Ribosomes
-
C.
Chromosomes
-
D.
Nucleotides
Solution
Plasmids are commonly used as vectors to transfer genetic material into host cells in genetic engineering.
Correct Answer:
A
— Plasmids
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Q. Which of the following is a complete protein source?
-
A.
Rice
-
B.
Beans
-
C.
Eggs
-
D.
Peanuts
Solution
Eggs are considered a complete protein source as they contain all essential amino acids.
Correct Answer:
C
— Eggs
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Q. Which of the following is a component of GDP? (2022)
-
A.
Consumption
-
B.
Investment
-
C.
Government Spending
-
D.
All of the above
Solution
All of the options listed are components of GDP, which includes consumption, investment, and government spending.
Correct Answer:
D
— All of the above
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Q. Which of the following is a component of nucleotides?
-
A.
Fatty acids
-
B.
Amino acids
-
C.
Nitrogenous bases
-
D.
Monosaccharides
Solution
Nucleotides are made up of a nitrogenous base, a sugar, and a phosphate group.
Correct Answer:
C
— Nitrogenous bases
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Q. Which of the following is a compound of hydrogen and carbon?
-
A.
H2O
-
B.
CH4
-
C.
NaH
-
D.
HCl
Solution
Methane (CH4) is a compound of hydrogen and carbon.
Correct Answer:
B
— CH4
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Q. Which of the following is a compound sentence? (2023)
-
A.
I like tea.
-
B.
I like tea and coffee.
-
C.
I like tea because it is hot.
-
D.
I like tea, but I prefer coffee.
Solution
A compound sentence contains two independent clauses, as in 'I like tea, but I prefer coffee.'
Correct Answer:
D
— I like tea, but I prefer coffee.
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Q. Which of the following is a conductor of electricity? (2021)
-
A.
Rubber
-
B.
Wood
-
C.
Copper
-
D.
Glass
Solution
Copper is a good conductor of electricity, while rubber, wood, and glass are insulators.
Correct Answer:
C
— Copper
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Q. Which of the following is a consequence of a trade deficit? (2019)
-
A.
Increased foreign investment
-
B.
Decreased national debt
-
C.
Depreciation of the national currency
-
D.
Increased exports
Solution
A trade deficit can lead to the depreciation of the national currency as more currency is sold to purchase foreign goods.
Correct Answer:
C
— Depreciation of the national currency
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Q. Which of the following is a consequence of acid rain?
-
A.
Soil degradation
-
B.
Increased biodiversity
-
C.
Improved crop yield
-
D.
None of the above
Solution
Acid rain leads to soil degradation, harming plant life and reducing biodiversity.
Correct Answer:
A
— Soil degradation
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Q. Which of the following is a consequence of deforestation? (2020)
-
A.
Increased biodiversity
-
B.
Soil erosion
-
C.
Improved air quality
-
D.
Increased rainfall
Solution
Deforestation leads to soil erosion as trees that hold the soil in place are removed, making the soil more susceptible to being washed away.
Correct Answer:
B
— Soil erosion
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Q. Which of the following is a consequence of eutrophication in water bodies?
-
A.
Increased biodiversity
-
B.
Decreased oxygen levels
-
C.
Improved water clarity
-
D.
Reduced algal growth
Solution
Eutrophication leads to increased nutrient levels, resulting in algal blooms that decrease oxygen levels in water bodies.
Correct Answer:
B
— Decreased oxygen levels
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Q. Which of the following is a consequence of eutrophication?
-
A.
Increased biodiversity
-
B.
Decreased oxygen levels
-
C.
Improved water clarity
-
D.
Reduction of algal blooms
Solution
Eutrophication leads to decreased oxygen levels in water bodies, which can harm aquatic life.
Correct Answer:
B
— Decreased oxygen levels
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Q. Which of the following is a consequence of global warming?
-
A.
Rising sea levels
-
B.
Increased ice cover
-
C.
Decreased temperatures
-
D.
None of the above
Solution
Global warming leads to rising sea levels due to the melting of polar ice and glaciers.
Correct Answer:
A
— Rising sea levels
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Q. Which of the following is a consequence of Lenz's law?
-
A.
Induced current opposes the change in magnetic flux
-
B.
Induced current enhances the change in magnetic flux
-
C.
Induced current is always zero
-
D.
Induced current is independent of magnetic field
Solution
Lenz's law states that the direction of induced current is such that it opposes the change in magnetic flux.
Correct Answer:
A
— Induced current opposes the change in magnetic flux
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Q. Which of the following is a consequence of Newton's law of gravitation?
-
A.
The orbits of planets are elliptical
-
B.
Masses repel each other
-
C.
Gravitational force is a vector quantity
-
D.
All objects fall at the same rate in a vacuum
Solution
Newton's law of gravitation leads to the conclusion that the orbits of planets are elliptical, as described by Kepler's laws.
Correct Answer:
A
— The orbits of planets are elliptical
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Q. Which of the following is a consequence of Raoult's Law in a binary solution?
-
A.
The total vapor pressure is the sum of the partial pressures.
-
B.
The total vapor pressure is always lower than the vapor pressure of the pure solvent.
-
C.
The mole fraction of the solute is always greater than that of the solvent.
-
D.
The boiling point of the solution is always higher than that of the pure solvent.
Solution
According to Raoult's Law, the total vapor pressure of a binary solution is the sum of the partial pressures of each component.
Correct Answer:
A
— The total vapor pressure is the sum of the partial pressures.
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