Undergraduate
Q. In how many ways can 4 prizes be distributed among 10 students?
-
A.
210
-
B.
5040
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C.
10000
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D.
1001
Solution
The number of ways to distribute 4 prizes among 10 students is 10P4 = 5040.
Correct Answer: B — 5040
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Q. In how many ways can 4 students be seated in a row of 6 chairs? (2021)
-
A.
360
-
B.
720
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C.
120
-
D.
240
Solution
Choose 4 chairs from 6 (6C4) and arrange 4 students (4!). Total = 15 * 24 = 360.
Correct Answer: B — 720
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Q. In how many ways can 5 different books be arranged on a shelf? (2021)
-
A.
60
-
B.
120
-
C.
240
-
D.
720
Solution
The number of arrangements of 5 distinct books is 5! = 120.
Correct Answer: D — 720
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Q. In how many ways can 5 different colored balls be arranged in a line?
-
A.
60
-
B.
120
-
C.
240
-
D.
720
Solution
The number of ways to arrange 5 different colored balls is 5! = 120.
Correct Answer: D — 720
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Q. In how many ways can 6 different colored balls be arranged in a row? (2018)
-
A.
720
-
B.
600
-
C.
480
-
D.
360
Solution
The number of arrangements of 6 distinct balls is 6! = 720.
Correct Answer: A — 720
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Q. In how many ways can 6 people be seated in a row?
-
A.
720
-
B.
600
-
C.
480
-
D.
360
Solution
The number of arrangements of 6 people is 6! = 720.
Correct Answer: A — 720
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Q. In how many ways can 7 people be divided into 3 groups if one group must have 3 people?
-
A.
210
-
B.
300
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C.
420
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D.
560
Solution
Choose 3 people from 7: C(7, 3) = 35. The remaining 4 can be divided into 2 groups in 2 ways. Total = 35 * 2 = 70.
Correct Answer: B — 300
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Q. In humans, the allele for brown eyes (B) is dominant over the allele for blue eyes (b). What is the genotype of a person with blue eyes? (2019)
Solution
A person with blue eyes must have the genotype bb, as blue is recessive.
Correct Answer: C — bb
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Q. In measurements, what does the term 'precision' refer to? (2022)
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A.
Closeness to the true value
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B.
Consistency of repeated measurements
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C.
Range of values
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D.
Average of measurements
Solution
Precision refers to the consistency of repeated measurements, regardless of their accuracy.
Correct Answer: B — Consistency of repeated measurements
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Q. In Mendel's experiments, which trait was observed to be dominant in pea plants? (2018)
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A.
Green seed color
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B.
Yellow seed color
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C.
Wrinkled seeds
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D.
Short plants
Solution
In Mendel's experiments, yellow seed color was observed to be the dominant trait in pea plants.
Correct Answer: B — Yellow seed color
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Q. In Mendel's experiments, which trait was observed to be dominant over the other? (2018)
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A.
Green seed color
-
B.
Yellow seed color
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C.
Round seed shape
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D.
Wrinkled seed shape
Solution
In Mendel's experiments, yellow seed color was observed to be dominant over green seed color.
Correct Answer: B — Yellow seed color
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Q. In nuclear fission, what is released as a result of the reaction? (2022)
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A.
Energy and neutrons
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B.
Only energy
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C.
Only neutrons
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D.
Protons and electrons
Solution
Nuclear fission releases a significant amount of energy and additional neutrons, which can induce further fission reactions.
Correct Answer: A — Energy and neutrons
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Q. In plants, which structure is primarily responsible for asexual reproduction? (2023)
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A.
Roots
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B.
Leaves
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C.
Stems
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D.
Flowers
Solution
Stems, particularly in the form of runners or tubers, are primarily responsible for asexual reproduction in many plants.
Correct Answer: C — Stems
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Q. In plants, which structure is responsible for sexual reproduction? (2021)
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A.
Roots
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B.
Leaves
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C.
Flowers
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D.
Stems
Solution
Flowers are the reproductive structures in plants that facilitate sexual reproduction.
Correct Answer: C — Flowers
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Q. In the context of atomic structure, what does the term 'isotope' refer to? (2021)
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A.
Atoms with the same number of protons but different neutrons
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B.
Atoms with different numbers of protons
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C.
Atoms with the same mass number
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D.
Atoms that are chemically identical
Solution
Isotopes are defined as atoms that have the same number of protons but different numbers of neutrons.
Correct Answer: A — Atoms with the same number of protons but different neutrons
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Q. In the context of atomic structure, what does the term 'quantum leap' refer to? (2022)
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A.
Movement of electrons in a circular path
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B.
Transition of an electron between energy levels
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C.
Emission of light
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D.
Absorption of energy
Solution
A 'quantum leap' refers to the transition of an electron between discrete energy levels in an atom.
Correct Answer: B — Transition of an electron between energy levels
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Q. In the expansion of (2x + 3)^4, what is the coefficient of x^0?
Solution
The coefficient of x^0 is given by 4C4 * (2x)^0 * (3)^4 = 1 * 81 = 81.
Correct Answer: A — 81
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Q. In the expansion of (2x - 5)^5, what is the coefficient of x^2? (2021)
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A.
-300
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B.
-600
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C.
600
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D.
300
Solution
The coefficient of x^2 is C(5,2) * (2)^2 * (-5)^3 = 10 * 4 * (-125) = -5000.
Correct Answer: A — -300
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Q. In the expansion of (2x - 5)^6, what is the coefficient of x^2? (2021)
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A.
-150
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B.
-300
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C.
300
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D.
150
Solution
The coefficient of x^2 is C(6,2) * (2)^2 * (-5)^4 = 15 * 4 * 625 = -37500.
Correct Answer: A — -150
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Q. In the expansion of (2x - 5)^6, what is the coefficient of x^3? (2020)
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A.
-600
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B.
-720
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C.
720
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D.
600
Solution
The coefficient of x^3 is C(6,3)(2)^3(-5)^3 = 20 * 8 * -125 = -20000.
Correct Answer: B — -720
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Q. In the expansion of (3x - 2)^6, what is the coefficient of x^4? (2022)
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A.
540
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B.
810
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C.
729
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D.
486
Solution
The coefficient of x^4 is given by 6C4 * (3)^4 * (-2)^2 = 15 * 81 * 4 = 4860.
Correct Answer: A — 540
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Q. In the expansion of (3x - 4)^4, what is the coefficient of x^2? (2023)
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A.
-144
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B.
-216
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C.
216
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D.
144
Solution
The coefficient of x^2 is C(4,2)(3)^2(-4)^2 = 6 * 9 * 16 = -864.
Correct Answer: B — -216
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Q. In the expansion of (x + 3)^4, what is the coefficient of x^3? (2023)
Solution
The coefficient of x^3 is C(4,3) * (3)^1 = 4 * 3 = 12.
Correct Answer: A — 36
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Q. In the expansion of (x - 1)^5, what is the coefficient of x^3?
Solution
The coefficient of x^3 is C(5,3) * (-1)^2 = 10.
Correct Answer: A — -10
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Q. In the kinetic theory of gases, the temperature of a gas is a measure of: (2022)
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A.
The average potential energy of the molecules
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B.
The average kinetic energy of the molecules
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C.
The total energy of the gas
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D.
The number of molecules in the gas
Solution
In the kinetic theory of gases, the temperature of a gas is a measure of the average kinetic energy of the molecules.
Correct Answer: B — The average kinetic energy of the molecules
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Q. In the kinetic theory of gases, the term 'elastic collision' means: (2019)
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A.
Kinetic energy is conserved
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B.
Momentum is conserved
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C.
Both kinetic energy and momentum are conserved
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D.
Neither kinetic energy nor momentum is conserved
Solution
In elastic collisions, both kinetic energy and momentum are conserved, which is a key assumption in the kinetic theory of gases.
Correct Answer: C — Both kinetic energy and momentum are conserved
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Q. In the Langmuir adsorption isotherm, which assumption is NOT made? (2019)
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A.
Adsorption occurs on a surface with a finite number of identical sites
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B.
Adsorption is reversible
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C.
There is no interaction between adsorbed molecules
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D.
Adsorption occurs only at high pressures
Solution
The Langmuir isotherm assumes that adsorption occurs at all pressures, not just high pressures.
Correct Answer: D — Adsorption occurs only at high pressures
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Q. In the photoelectric effect, what happens when the frequency of incident light is increased? (2020)
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A.
More electrons are emitted
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B.
Electrons are emitted with higher energy
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C.
No electrons are emitted
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D.
The current decreases
Solution
Increasing the frequency of incident light increases the energy of emitted electrons, as per E = hf.
Correct Answer: B — Electrons are emitted with higher energy
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Q. In the reaction 2Ag+ + Zn → 2Ag + Zn2+, what is the oxidation state of zinc after the reaction?
Solution
Zinc (Zn) is oxidized to Zn2+, so its oxidation state is +2.
Correct Answer: B — +2
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Q. In the reaction 2Ag⁺ + Zn → 2Ag + Zn²⁺, which species is reduced? (2023)
-
A.
Ag⁺
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B.
Zn
-
C.
Ag
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D.
Zn²⁺
Solution
In this reaction, Ag⁺ gains electrons to form Ag, thus it is reduced.
Correct Answer: A — Ag⁺
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