Q. What is the main substrate for respiration in plants? (2023)
A.
Starch
B.
Glucose
C.
Cellulose
D.
Sucrose
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Solution
Glucose is the main substrate for respiration in plants, as it is broken down to release energy.
Correct Answer:
B
— Glucose
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Q. What is the main type of reaction that haloalkanes undergo? (2020)
A.
Addition
B.
Substitution
C.
Elimination
D.
Redox
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Solution
Haloalkanes primarily undergo nucleophilic substitution reactions due to the presence of a good leaving group (halogen).
Correct Answer:
B
— Substitution
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Q. What is the main use of citric acid?
A.
Preservative
B.
Flavoring agent
C.
Cleaning agent
D.
All of the above
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Solution
Citric acid is used as a preservative, flavoring agent, and cleaning agent.
Correct Answer:
D
— All of the above
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Q. What is the main vector for malaria transmission? (2021)
A.
Housefly
B.
Mosquito
C.
Tick
D.
Flea
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Solution
Malaria is primarily transmitted by the female Anopheles mosquito.
Correct Answer:
B
— Mosquito
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Q. What is the main vector for the transmission of malaria? (2019)
A.
Housefly
B.
Mosquito
C.
Tick
D.
Flea
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Solution
Malaria is primarily transmitted through the bite of infected female Anopheles mosquitoes.
Correct Answer:
B
— Mosquito
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Q. What is the major product of the reaction of 1-bromobutane with sodium hydroxide in ethanol? (2019)
A.
Butanol
B.
Butene
C.
Butyl bromide
D.
Sodium bromide
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Solution
The reaction of 1-bromobutane with sodium hydroxide in ethanol leads to elimination, forming butene as the major product.
Correct Answer:
B
— Butene
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Q. What is the major product when 1-bromobutane reacts with sodium ethoxide? (2021)
A.
Butane
B.
Ethyl butyl ether
C.
1-butanol
D.
2-butanol
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Solution
The reaction of 1-bromobutane with sodium ethoxide leads to the formation of ethyl butyl ether through an SN2 mechanism.
Correct Answer:
B
— Ethyl butyl ether
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Q. What is the major product when 2-bromobutane is treated with KOH in ethanol?
A.
But-1-ene
B.
But-2-ene
C.
Butane
D.
No reaction
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Solution
The major product is But-2-ene due to the more stable double bond formed during elimination.
Correct Answer:
B
— But-2-ene
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Q. What is the male gamete in flowering plants called? (2020)
A.
Ovule
B.
Pollen
C.
Style
D.
Stigma
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Solution
The male gamete in flowering plants is called pollen, which is produced in the anthers of the stamen.
Correct Answer:
B
— Pollen
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Q. What is the male reproductive part of a flower called? (2020)
A.
Stigma
B.
Anther
C.
Ovary
D.
Style
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Solution
The male reproductive part of a flower is called the stamen, which consists of the anther and filament. The anther is the part that produces pollen.
Correct Answer:
B
— Anther
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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 mass of 3 moles of NaCl? (2020) 2020
A.
87 g
B.
58.5 g
C.
174 g
D.
3 g
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Solution
Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol. Mass = moles x molar mass = 3 moles x 58.5 g/mol = 174 g.
Correct Answer:
C
— 174 g
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Q. What is the mass of 3 moles of sodium chloride (NaCl)? (2023)
A.
58.5 g
B.
117 g
C.
175.5 g
D.
29.25 g
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Solution
The molar mass of NaCl is 58.5 g/mol. Therefore, 3 moles of NaCl weigh 3 x 58.5 g = 175.5 g.
Correct Answer:
B
— 117 g
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Q. What is the mass of NaOH required to prepare 0.5 L of a 1 M solution? (2023)
A.
20 g
B.
40 g
C.
10 g
D.
30 g
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Solution
Molar mass of NaOH = 40 g/mol; grams = moles × molar mass = (1 mole/L × 0.5 L) × 40 g/mol = 20 g
Correct Answer:
B
— 40 g
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Q. What is the mass of solute in grams in a 3 M solution of NaCl in 1 L of solution? (2023)
A.
58.44 g
B.
174.32 g
C.
29.22 g
D.
87.16 g
Show solution
Solution
Molar mass of NaCl = 58.44 g/mol; mass = moles × molar mass = 3 moles × 58.44 g/mol = 175.32 g
Correct Answer:
B
— 174.32 g
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Q. What is the mass of solute in grams required to make 1 L of a 0.1 M solution of NaCl? (Molar mass of NaCl = 58.5 g/mol) (2021)
A.
5.85 g
B.
10 g
C.
1 g
D.
2 g
Show solution
Solution
Mass = moles × molar mass = (0.1 moles/L × 1 L) × 58.5 g/mol = 5.85 g.
Correct Answer:
A
— 5.85 g
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Q. What is the mass of solute in grams required to make 1 L of a 0.5 M NaOH solution? (2021)
A.
20 g
B.
40 g
C.
10 g
D.
30 g
Show solution
Solution
Molar mass of NaOH = 40 g/mol. Mass = moles × molar mass = 0.5 moles × 40 g/mol = 20 g.
Correct Answer:
B
— 40 g
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Q. What is the mass percent of a solution containing 10 g of solute in 90 g of solvent?
A.
10%
B.
90%
C.
50%
D.
20%
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Solution
Mass percent = (mass of solute / total mass of solution) x 100 = (10 g / (10 g + 90 g)) x 100 = 10%
Correct Answer:
A
— 10%
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Q. What is the mass-energy equivalence formula proposed by Einstein? (2019)
A.
E = mc^2
B.
E = mv^2
C.
E = mgh
D.
E = hf
Show solution
Solution
The mass-energy equivalence formula is E = mc^2, which states that energy (E) is equal to mass (m) times the speed of light (c) squared.
Correct Answer:
A
— E = mc^2
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Q. What is the maximum area of a triangle with a base of 10 cm and height as a function of x? (2020)
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Solution
Area = 1/2 * base * height = 1/2 * 10 * x. Max area occurs when x = 10, giving Area = 50.
Correct Answer:
B
— 50
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Q. What is the maximum area of a triangle with a base of 10 cm and height varying with x? (2021)
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Solution
Area = 1/2 * base * height. Max area occurs when height is maximized, thus Area = 1/2 * 10 * 10 = 50.
Correct Answer:
B
— 50
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Q. What is the maximum area of a triangle with a base of 10 m and height as a function of x? (2021)
A.
25 m²
B.
50 m²
C.
30 m²
D.
20 m²
Show solution
Solution
Area = 1/2 * base * height = 1/2 * 10 * x. Max area occurs at x = 10, giving 50 m².
Correct Answer:
B
— 50 m²
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Q. What is the maximum area of a triangle with a base of 10 units and height as a function of x? (2020)
Show solution
Solution
Area = 1/2 * base * height = 5h. Max area occurs when h = 10, giving area = 50.
Correct Answer:
B
— 50
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Q. What is the maximum area of a triangle with a base of 10 units and height as a function of the base? (2021)
Show solution
Solution
Area = 0.5 * base * height. Max area occurs when height is 10, giving Area = 0.5 * 10 * 10 = 50.
Correct Answer:
B
— 50
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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 displacement of a mass-spring system oscillating with an amplitude of 0.3 m? (2023)
A.
0.1 m
B.
0.2 m
C.
0.3 m
D.
0.4 m
Show solution
Solution
The maximum displacement in a mass-spring system is defined as the amplitude, which is given as 0.3 m.
Correct Answer:
C
— 0.3 m
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Q. What is the maximum displacement of a simple harmonic oscillator called? (2022)
A.
Amplitude
B.
Frequency
C.
Wavelength
D.
Period
Show solution
Solution
The maximum displacement from the mean position in simple harmonic motion is called amplitude.
Correct Answer:
A
— Amplitude
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Q. What is the maximum height of the projectile modeled by h(t) = -16t^2 + 32t + 48? (2023)
Show solution
Solution
The maximum height occurs at t = -b/(2a) = 1. h(1) = 64.
Correct Answer:
B
— 64
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Q. What is the maximum height of the projectile modeled by h(t) = -16t^2 + 64t + 48? (2021)
Show solution
Solution
The maximum height occurs at t = -b/(2a) = -64/(2*-16) = 2. h(2) = -16(2^2) + 64(2) + 48 = 80.
Correct Answer:
B
— 64
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Q. What is the maximum number of bright fringes observed in a double-slit experiment if the wavelength of light is 500 nm and the distance between the slits is 0.1 mm? (2020)
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Solution
The maximum number of bright fringes is given by the formula n = d/λ. Here, n = 0.1 mm / 500 nm = 200, which means 20 bright fringes can be observed on either side of the central maximum.
Correct Answer:
C
— 20
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