Q. Which of the following is a common preservative used in food?
-
A.
Sodium chloride
-
B.
Sodium benzoate
-
C.
Sucrose
-
D.
Vinegar
Solution
Sodium benzoate is commonly used as a preservative to inhibit the growth of bacteria and fungi.
Correct Answer: B — Sodium benzoate
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Q. Which of the following is a common property of group 14 elements?
-
A.
They are all gases
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B.
They can form multiple oxidation states
-
C.
They are all nonmetals
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D.
They have low melting points
Solution
Group 14 elements can exhibit multiple oxidation states, such as +4 and +2.
Correct Answer: B — They can form multiple oxidation states
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Q. Which of the following is a common test for the presence of aromatic compounds?
-
A.
Bromine water test
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B.
Baeyer test
-
C.
Tollen's test
-
D.
Benzene test
Solution
The bromine water test can be used to detect unsaturation; however, aromatic compounds do not react with bromine water, indicating their stability.
Correct Answer: A — Bromine water test
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Q. Which of the following is a common use of aspirin in everyday life?
-
A.
Pain relief
-
B.
Antibiotic
-
C.
Antidepressant
-
D.
Antihistamine
Solution
Aspirin is widely used for pain relief due to its analgesic properties.
Correct Answer: A — Pain relief
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Q. Which of the following is a common use of aspirin?
-
A.
Pain relief
-
B.
Antibiotic
-
C.
Antidepressant
-
D.
Antihistamine
Solution
Aspirin is commonly used for pain relief and to reduce inflammation.
Correct Answer: A — Pain relief
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Q. Which of the following is a common use of chlorine in everyday life?
-
A.
Disinfecting water
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B.
Flavoring food
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C.
Coloring hair
-
D.
Preserving meat
Solution
Chlorine is commonly used to disinfect drinking water, making it safe for consumption.
Correct Answer: A — Disinfecting water
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Q. Which of the following is a common use of ethanol in everyday life?
-
A.
Fuel
-
B.
Antiseptic
-
C.
Solvent
-
D.
All of the above
Solution
Ethanol is used as a fuel, antiseptic, and solvent, making it versatile in everyday applications.
Correct Answer: D — All of the above
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Q. Which of the following is a common use of ethanol?
-
A.
Fuel
-
B.
Antiseptic
-
C.
Solvent
-
D.
All of the above
Solution
Ethanol is widely used as a fuel, antiseptic, and solvent, making it versatile in everyday applications.
Correct Answer: D — All of the above
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Q. Which of the following is a common use of hydrogen peroxide in households?
-
A.
Disinfectant
-
B.
Bleach
-
C.
Antiseptic
-
D.
All of the above
Solution
Hydrogen peroxide is used as a disinfectant, bleach, and antiseptic in various household applications.
Correct Answer: D — All of the above
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Q. Which of the following is a common use of hydrogen peroxide?
-
A.
Disinfectant
-
B.
Bleach
-
C.
Antiseptic
-
D.
All of the above
Solution
Hydrogen peroxide is used as a disinfectant, bleach, and antiseptic.
Correct Answer: D — All of the above
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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 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 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 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 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 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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Q. Which of the following is a consequence of the law of universal gravitation?
-
A.
The orbits of planets are elliptical
-
B.
All objects fall at the same rate in a vacuum
-
C.
Gravity is a contact force
-
D.
Mass does not affect gravitational attraction
Solution
The law of universal 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 correct application of Ampere's Law?
-
A.
Calculating electric field in a capacitor
-
B.
Finding the magnetic field in a toroid
-
C.
Determining the potential difference across a resistor
-
D.
Calculating the energy stored in an inductor
Solution
Ampere's Law is used to find the magnetic field in a toroid, where the symmetry allows for straightforward application of the law.
Correct Answer: B — Finding the magnetic field in a toroid
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Q. Which of the following is a correct application of Raoult's Law?
-
A.
Calculating the boiling point elevation
-
B.
Determining the freezing point depression
-
C.
Finding the vapor pressure of a solution
-
D.
Measuring the solubility of a gas in a liquid
Solution
Raoult's Law is used to find the vapor pressure of a solution based on the vapor pressures of its components.
Correct Answer: C — Finding the vapor pressure of a solution
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Q. Which of the following is a correct expression for Gibbs Free Energy?
-
A.
ΔG = ΔH + TΔS
-
B.
ΔG = ΔH - TΔS
-
C.
ΔG = TΔS - ΔH
-
D.
ΔG = ΔS - ΔH
Solution
The correct expression for Gibbs Free Energy is ΔG = ΔH - TΔS.
Correct Answer: B — ΔG = ΔH - TΔS
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Q. Which of the following is a correct representation of significant figures?
-
A.
0.00450
-
B.
4500
-
C.
0.0450
-
D.
4500.0
Solution
0.00450 has 3 significant figures due to the trailing zero after the 5.
Correct Answer: A — 0.00450
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