Q. Which of the following is an example of a colligative property? (2021)
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A.
Boiling point elevation
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B.
Density
-
C.
Color
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D.
pH
Solution
Colligative properties depend on the number of solute particles in a solution, and boiling point elevation is one such property.
Correct Answer: A — Boiling point elevation
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Q. Which of the following is an example of a compound sentence? (2019)
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A.
I like tea.
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B.
I like tea, and I like coffee.
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C.
I like tea because it is hot.
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D.
I like tea when it is cold.
Solution
A compound sentence contains two independent clauses, as in 'I like tea, and I like coffee.'
Correct Answer: B — I like tea, and I like coffee.
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Q. Which of the following is an example of a compound that exhibits tautomeric isomerism?
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A.
Acetaldehyde
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B.
Acetone
-
C.
Ethanol
-
D.
Benzene
Solution
Acetaldehyde can exist in two forms (keto and enol) that readily interconvert, demonstrating tautomeric isomerism.
Correct Answer: A — Acetaldehyde
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Q. Which of the following is an example of a condensation polymer? (2023)
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A.
Polyethylene
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B.
Nylon-6,6
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C.
Polystyrene
-
D.
Polyvinyl chloride
Solution
Nylon-6,6 is a condensation polymer formed by the reaction of hexamethylenediamine and adipic acid.
Correct Answer: B — Nylon-6,6
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Q. Which of the following is an example of a constraint that could be applied to a set of integers?
-
A.
All elements must be even numbers.
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B.
All elements must be prime numbers.
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C.
All elements must be greater than 10.
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D.
All of the above.
Solution
Each of the options listed represents a valid constraint that can be applied to a set of integers.
Correct Answer: D — All of the above.
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Q. Which of the following is an example of a copolymer?
-
A.
Polyethylene
-
B.
Nylon-6,6
-
C.
Polystyrene
-
D.
Polyvinyl chloride
Solution
Nylon-6,6 is a copolymer made from two different monomers: hexamethylenediamine and adipic acid.
Correct Answer: B — Nylon-6,6
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Q. Which of the following is an example of a crystalline solid?
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A.
Sugar
-
B.
Glass
-
C.
Rubber
-
D.
Plastic
Solution
Sugar is an example of a crystalline solid, characterized by a well-ordered structure.
Correct Answer: A — Sugar
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Q. Which of the following is an example of a decomposer? (2023)
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A.
Fungi
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B.
Grass
-
C.
Lion
-
D.
Insect
Solution
Fungi are decomposers that break down dead organic matter, returning nutrients to the soil.
Correct Answer: A — Fungi
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Q. Which of the following is an example of a density-dependent factor affecting population growth? (2021)
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A.
Natural disasters
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B.
Disease
-
C.
Climate change
-
D.
Habitat destruction
Solution
Density-dependent factors, such as disease, have a greater effect as the population density increases.
Correct Answer: B — Disease
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Q. Which of the following is an example of a dihybrid cross? (2019)
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A.
Aa x Aa
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B.
AaBb x AaBb
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C.
AA x aa
-
D.
Aa x aa
Solution
A dihybrid cross involves two traits, and AaBb x AaBb is an example of such a cross.
Correct Answer: B — AaBb x AaBb
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Q. Which of the following is an example of a disproportionation reaction?
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A.
2H2O2 → 2H2O + O2
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B.
Zn + CuSO4 → ZnSO4 + Cu
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C.
2Na + Cl2 → 2NaCl
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D.
C + O2 → CO2
Solution
In the reaction 2H2O2 → 2H2O + O2, hydrogen peroxide is both oxidized and reduced.
Correct Answer: A — 2H2O2 → 2H2O + O2
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Q. Which of the following is an example of a genetically modified organism used in agriculture? (2023)
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A.
Golden rice
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B.
Organic wheat
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C.
Traditional maize
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D.
Heritage tomatoes
Solution
Golden rice is a genetically modified organism enriched with vitamin A to combat malnutrition.
Correct Answer: A — Golden rice
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Q. Which of the following is an example of a genetically modified organism? (2021)
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A.
Organic tomatoes
-
B.
Bt corn
-
C.
Heritage wheat
-
D.
Wild strawberries
Solution
Bt corn is genetically modified to express a bacterial protein that provides resistance to certain pests.
Correct Answer: B — Bt corn
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Q. Which of the following is an example of a keystone species? (2018)
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A.
Elephants
-
B.
Rabbits
-
C.
Deer
-
D.
Sparrows
Solution
Elephants are considered a keystone species because they play a critical role in maintaining the structure of their ecosystem.
Correct Answer: A — Elephants
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Q. Which of the following is an example of a Lewis acid?
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A.
NH3
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B.
H2O
-
C.
BF3
-
D.
CH4
Solution
BF3 is a Lewis acid as it can accept a pair of electrons.
Correct Answer: C — BF3
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Q. Which of the following is an example of a longitudinal wave? (2023)
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A.
Light wave
-
B.
Sound wave
-
C.
Water wave
-
D.
Seismic S-wave
Solution
A sound wave is an example of a longitudinal wave, where the particle displacement is parallel to the direction of wave propagation.
Correct Answer: B — Sound wave
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Q. Which of the following is an example of a lyophilic colloid? (2021)
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A.
Starch in water
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B.
Smoke in air
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C.
Milk
-
D.
Dust in air
Solution
Starch in water is a lyophilic colloid as it has a strong affinity for the solvent.
Correct Answer: A — Starch in water
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Q. Which of the following is an example of a metalloid? (2022)
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A.
Bromine
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B.
Silicon
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C.
Sodium
-
D.
Calcium
Solution
Silicon is classified as a metalloid, exhibiting properties of both metals and non-metals.
Correct Answer: B — Silicon
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Q. Which of the following is an example of a molecular solid? (2023)
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A.
NaCl
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B.
Diamond
-
C.
Iodine (I2)
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D.
Iron (Fe)
Solution
Iodine (I2) is an example of a molecular solid, where molecules are held together by van der Waals forces.
Correct Answer: C — Iodine (I2)
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Q. Which of the following is an example of a mutualistic relationship? (2023)
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A.
Bees pollinating flowers
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B.
Lions hunting zebras
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C.
Moss growing on a tree
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D.
Birds nesting in trees
Solution
Bees pollinating flowers is a mutualistic relationship where both species benefit from the interaction.
Correct Answer: A — Bees pollinating flowers
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Q. Which of the following is an example of a natural sweetener? (2021)
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A.
Aspartame
-
B.
Stevia
-
C.
Sucralose
-
D.
Saccharin
Solution
Stevia is a natural sweetener derived from the leaves of the Stevia rebaudiana plant, making it a healthier alternative to synthetic sweeteners.
Correct Answer: B — Stevia
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Q. Which of the following is an example of a non-conservative force?
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A.
Gravitational force
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B.
Electrostatic force
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C.
Frictional force
-
D.
Magnetic force
Solution
Frictional force is an example of a non-conservative force as it dissipates energy as heat.
Correct Answer: C — Frictional force
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Q. Which of the following is an example of a non-contact force?
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A.
Friction
-
B.
Tension
-
C.
Magnetic force
-
D.
Normal force
Solution
Magnetic force is an example of a non-contact force, as it acts at a distance.
Correct Answer: C — Magnetic force
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Q. Which of the following is an example of a non-Newtonian fluid?
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A.
Water
-
B.
Air
-
C.
Cornstarch in water
-
D.
Glycerin
Solution
Cornstarch in water (oobleck) is a non-Newtonian fluid that exhibits varying viscosity depending on the shear rate.
Correct Answer: C — Cornstarch in water
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Q. Which of the following is an example of a non-renewable energy source? (2017)
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A.
Solar energy
-
B.
Wind energy
-
C.
Natural gas
-
D.
Hydropower
Solution
Natural gas is a non-renewable energy source as it is derived from fossil fuels that cannot be replenished in a short time.
Correct Answer: C — Natural gas
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Q. Which of the following is an example of a non-stoichiometric solid? (2023)
-
A.
NaCl
-
B.
FeO
-
C.
MgO
-
D.
KCl
Solution
FeO is an example of a non-stoichiometric solid because it can have varying ratios of iron and oxygen.
Correct Answer: B — FeO
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Q. Which of the following is an example of a peripheral device?
-
A.
CPU
-
B.
RAM
-
C.
Scanner
-
D.
Motherboard
Solution
A scanner is an example of a peripheral device that is used to input images and documents into a computer.
Correct Answer: C — Scanner
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Q. Which of the following is an example of a physical adsorption?
-
A.
Adsorption of O2 on activated charcoal
-
B.
Adsorption of H2 on palladium
-
C.
Adsorption of NH3 on silica gel
-
D.
Adsorption of CO on metals
Solution
The adsorption of O2 on activated charcoal is an example of physical adsorption.
Correct Answer: A — Adsorption of O2 on activated charcoal
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Q. Which of the following is an example of a physical change related to states of matter?
-
A.
Burning wood
-
B.
Dissolving sugar in water
-
C.
Rusting of iron
-
D.
Cooking an egg
Solution
Dissolving sugar in water is a physical change as it does not alter the chemical composition.
Correct Answer: B — Dissolving sugar in water
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Q. Which of the following is an example of a physical change? (2019)
-
A.
Burning wood
-
B.
Dissolving sugar in water
-
C.
Rusting iron
-
D.
Cooking an egg
Solution
Dissolving sugar in water is a physical change because it can be reversed by evaporation.
Correct Answer: B — Dissolving sugar in water
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