Q. What is the mass defect of a nucleus? (2019)
A.
The difference between the mass of the nucleus and the sum of the masses of its individual nucleons
B.
The mass of the nucleus itself
C.
The mass of the electrons surrounding the nucleus
D.
The mass of the nucleus in a different state
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Solution
The mass defect is the difference between the mass of the nucleus and the sum of the masses of its individual nucleons, which accounts for the binding energy.
Correct Answer: A — The difference between the mass of the nucleus and the sum of the masses of its individual nucleons
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Q. What is the maximum displacement from the mean position in simple harmonic motion called? (2022)
A.
Amplitude
B.
Frequency
C.
Period
D.
Wavelength
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Solution
The maximum displacement from the mean position in simple harmonic motion is called the amplitude.
Correct Answer: A — Amplitude
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Q. What is the maximum number of electrons that can be accommodated in the d subshell? (2019)
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Solution
The d subshell can hold a maximum of 10 electrons.
Correct Answer: C — 10
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Q. What is the maximum number of electrons that can be accommodated in the p subshell? (2023)
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Solution
The p subshell can hold a maximum of 6 electrons.
Correct Answer: B — 6
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Q. What is the maximum number of electrons that can occupy the n=3 energy level in an atom? (2021)
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Solution
The maximum number of electrons in an energy level is given by the formula 2n². For n=3, it is 2(3)² = 18.
Correct Answer: C — 18
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Q. What is the maximum number of electrons that can occupy the n=4 energy level? (2021)
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Solution
The maximum number of electrons in an energy level is given by 2n^2. For n=4, it is 2(4^2) = 32.
Correct Answer: B — 18
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Q. What is the minimum thickness of a soap bubble for which the first order of bright fringe is observed in reflected light? (2020)
A.
λ/4
B.
λ/2
C.
λ
D.
3λ/4
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Solution
For the first order of bright fringe in reflected light, the minimum thickness of the soap bubble is λ/4 due to the phase change upon reflection.
Correct Answer: A — λ/4
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Q. What is the molality of a solution containing 3 moles of solute in 1 kg of solvent? (2022)
A.
3 m
B.
1.5 m
C.
0.5 m
D.
2 m
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Solution
Molality (m) = moles of solute / kg of solvent = 3 moles / 1 kg = 3 m.
Correct Answer: A — 3 m
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Q. What is the molality of a solution containing 3 moles of solute in 500 g of solvent? (2021)
A.
6 m
B.
3 m
C.
1.5 m
D.
0.5 m
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Solution
Molality (m) = moles of solute / kg of solvent = 3 moles / 0.5 kg = 6 m.
Correct Answer: B — 3 m
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Q. What is the molecular formula of cyclohexane? (2022)
A.
C6H12
B.
C6H10
C.
C6H14
D.
C6H6
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Solution
Cyclohexane is a cyclic alkane with the formula C6H12.
Correct Answer: A — C6H12
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Q. What is the molecular formula of ethyne? (2022)
A.
C2H2
B.
C2H4
C.
C2H6
D.
C3H4
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Solution
Ethyne, also known as acetylene, has the molecular formula C2H2.
Correct Answer: A — C2H2
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Q. What is the molecular formula of the simplest alkyne? (2022)
A.
C2H2
B.
C2H4
C.
C3H4
D.
C3H6
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Solution
The simplest alkyne is ethyne (acetylene) with the molecular formula C2H2.
Correct Answer: A — C2H2
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Q. What is the monomer of nucleic acids? (2023)
A.
Amino acid
B.
Nucleotide
C.
Monosaccharide
D.
Fatty acid
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Solution
Nucleotides are the monomers that make up nucleic acids.
Correct Answer: B — Nucleotide
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Q. What is the nature of the image formed by a concave mirror when the object is placed between the focal point and the mirror? (2021)
A.
Real and inverted
B.
Virtual and erect
C.
Real and erect
D.
Virtual and inverted
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Solution
When the object is placed between the focal point and the mirror, the image formed is virtual and erect.
Correct Answer: B — Virtual and erect
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Q. What is the nature of the image formed by a convex lens when the object is placed beyond the 2F point? (2019)
A.
Real and inverted
B.
Virtual and erect
C.
Real and erect
D.
Virtual and inverted
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Solution
When the object is placed beyond 2F, the image formed by a convex lens is real, inverted, and diminished.
Correct Answer: A — Real and inverted
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Q. What is the net gain of ATP from one molecule of glucose during aerobic respiration? (2023)
A.
2 ATP
B.
30-32 ATP
C.
36 ATP
D.
38 ATP
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Solution
The net gain of ATP from one molecule of glucose during aerobic respiration is approximately 30-32 ATP, depending on the efficiency of the process.
Correct Answer: B — 30-32 ATP
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Q. What is the net gain of ATP molecules from one molecule of glucose during aerobic respiration? (2023)
A.
2
B.
18
C.
30-32
D.
36
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Solution
The net gain of ATP molecules from one molecule of glucose during aerobic respiration is approximately 30-32 ATP.
Correct Answer: C — 30-32
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Q. What is the normal pH range of human blood? (2019)
A.
6.8 - 7.2
B.
7.35 - 7.45
C.
7.0 - 7.5
D.
7.8 - 8.0
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Solution
The normal pH range of human blood is tightly regulated between 7.35 and 7.45, which is essential for proper physiological function.
Correct Answer: B — 7.35 - 7.45
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Q. What is the normal pH range of human urine? (2022)
A.
4.5 - 5.5
B.
6.0 - 7.0
C.
7.5 - 8.0
D.
9.0 - 10.0
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Solution
The normal pH range of human urine is typically between 6.0 and 7.0, indicating it is slightly acidic.
Correct Answer: B — 6.0 - 7.0
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Q. What is the normal respiratory rate for a healthy adult at rest? (2022)
A.
10-12 breaths per minute
B.
12-20 breaths per minute
C.
20-30 breaths per minute
D.
30-40 breaths per minute
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Solution
The normal respiratory rate for a healthy adult at rest is typically between 12 to 20 breaths per minute.
Correct Answer: B — 12-20 breaths per minute
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Q. What is the osmotic pressure of a solution containing 0.1 moles of glucose in 1 L of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
A.
2.03 atm
B.
1.96 atm
C.
0.82 atm
D.
0.25 atm
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Solution
Osmotic pressure (π) = nRT/V = (0.1 mol)(0.0821 L·atm/(K·mol))(298 K) = 2.03 atm.
Correct Answer: A — 2.03 atm
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Q. What is the osmotic pressure of a solution containing 0.1 moles of glucose in 1 liter of solution at 25 °C? (R = 0.0821 L atm/K mol) (2020)
A.
2.06 atm
B.
0.82 atm
C.
1.01 atm
D.
0.25 atm
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Solution
Osmotic pressure (π) = nRT/V = (0.1 mol)(0.0821 L atm/K mol)(298 K) = 2.06 atm.
Correct Answer: A — 2.06 atm
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Q. What is the osmotic pressure of a solution containing 0.1 moles of solute in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
A.
2.5 atm
B.
0.82 atm
C.
1.0 atm
D.
0.25 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.1 moles * 0.0821 * 298) / 1 = 2.5 atm.
Correct Answer: A — 2.5 atm
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Q. What is the osmotic pressure of a solution containing 0.5 moles of solute in 1 liter of solution at 25 °C? (2021)
A.
12.3 atm
B.
24.6 atm
C.
6.1 atm
D.
3.1 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.5 moles)(0.0821 L·atm/(K·mol))(298 K) = 12.3 atm.
Correct Answer: B — 24.6 atm
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Q. What is the osmotic pressure of a solution containing 0.5 moles of solute in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2021)
A.
12.3 atm
B.
10.2 atm
C.
8.2 atm
D.
6.1 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.5 moles * 0.0821 L·atm/(K·mol) * 298 K) / 1 L = 12.3 atm.
Correct Answer: B — 10.2 atm
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Q. What is the osmotic pressure of a solution containing 2 moles of glucose in 1 liter of solution at 25 °C? (2021)
A.
0.0821 atm
B.
1.0 atm
C.
2.0 atm
D.
4.0 atm
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Solution
Osmotic pressure (π) = iCRT = 1 * 2 * 0.0821 * 298 = 4.0 atm (i = 1 for glucose).
Correct Answer: C — 2.0 atm
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Q. What is the osmotic pressure of a solution containing 2 moles of glucose in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
A.
0.82 atm
B.
1.64 atm
C.
2.46 atm
D.
4.92 atm
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Solution
Osmotic pressure (π) = nRT/V = (2 moles * 0.0821 L·atm/(K·mol) * 298 K) / 1 L = 4.92 atm.
Correct Answer: B — 1.64 atm
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Q. What is the outermost layer of a plant stem called? (2022)
A.
Cortex
B.
Epidermis
C.
Phloem
D.
Xylem
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Solution
The outermost layer of a plant stem is called the epidermis, which protects the plant from environmental damage.
Correct Answer: B — Epidermis
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Q. What is the outermost layer of cells in a plant called? (2023)
A.
Cortex
B.
Epidermis
C.
Phloem
D.
Xylem
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Solution
The outermost layer of cells in a plant is called the epidermis, which protects the plant from environmental damage.
Correct Answer: B — Epidermis
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Q. What is the outermost whorl of a flower called? (2023)
A.
Calyx
B.
Corolla
C.
Androecium
D.
Gynoecium
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Solution
The outermost whorl of a flower is called the calyx, which is made up of sepals.
Correct Answer: A — Calyx
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