Q. What is the main product of the complete combustion of methane? (2023)
-
A.
Carbon dioxide and water
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B.
Carbon monoxide and water
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C.
Carbon and hydrogen
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D.
Oxygen and water
Solution
The complete combustion of methane (CH4) produces carbon dioxide (CO2) and water (H2O).
Correct Answer: A — Carbon dioxide and water
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Q. What is the main product of the oxidation of ethanol?
-
A.
Acetic acid
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B.
Formic acid
-
C.
Butanoic acid
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D.
Propanoic acid
Solution
The main product of the oxidation of ethanol is acetic acid.
Correct Answer: A — Acetic acid
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Q. What is the main product when 1-bromobutane reacts with sodium hydroxide in ethanol? (2021)
-
A.
Butanol
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B.
Butene
-
C.
Sodium bromide
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D.
Butyric acid
Solution
The reaction of 1-bromobutane with sodium hydroxide in ethanol leads to elimination, forming butene as the main product.
Correct Answer: B — Butene
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Q. What is the main product when an amine reacts with an acyl chloride?
-
A.
Amide
-
B.
Ester
-
C.
Alcohol
-
D.
Aldehyde
Solution
The reaction of an amine with an acyl chloride produces an amide.
Correct Answer: A — Amide
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Q. What is the main product when an amine reacts with an alkyl halide?
-
A.
Amide
-
B.
Quaternary ammonium salt
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C.
Alcohol
-
D.
Ester
Solution
The main product is a quaternary ammonium salt when an amine reacts with an alkyl halide, as the amine can be further alkylated.
Correct Answer: B — Quaternary ammonium salt
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Q. What is the main product when ethene reacts with bromine?
-
A.
Bromethane
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B.
1,2-Dibromoethane
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C.
Ethane
-
D.
Bromoethane
Solution
The reaction of ethene with bromine results in the formation of 1,2-dibromoethane.
Correct Answer: B — 1,2-Dibromoethane
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Q. What is the main product when ethene reacts with hydrogen in the presence of a catalyst?
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A.
Ethane
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B.
Ethanol
-
C.
Ethyl chloride
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D.
Acetylene
Solution
The main product is ethane, formed by the hydrogenation of ethene.
Correct Answer: A — Ethane
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Q. What is the main product when phenol is treated with bromine?
-
A.
Bromobenzene
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B.
Bromophenol
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C.
Benzene
-
D.
Bromobutane
Solution
Bromine reacts with phenol to form bromophenol, which is a substitution product.
Correct Answer: B — Bromophenol
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Q. What is the main product when phenol reacts with bromine? (2019)
-
A.
Bromobenzene
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B.
Bromophenol
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C.
Benzene
-
D.
No reaction
Solution
Phenol reacts with bromine to form Bromophenol, which is a brominated derivative of phenol.
Correct Answer: B — Bromophenol
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Q. What is the main product when phenol reacts with sodium hydroxide?
-
A.
Sodium phenoxide
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B.
Sodium benzoate
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C.
Benzene
-
D.
Phenyl acetate
Solution
Phenol reacts with sodium hydroxide to form sodium phenoxide, which is a salt of phenol.
Correct Answer: A — Sodium phenoxide
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Q. What is the main product when propan-2-one is treated with iodine in the presence of a base?
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A.
Iodoform
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B.
Acetone
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C.
Bromoform
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D.
Chloroform
Solution
Propan-2-one (acetone) reacts with iodine in the presence of a base to form Iodoform.
Correct Answer: A — Iodoform
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Q. What is the main reaction of phenols with bromine water? (2020)
-
A.
No reaction
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B.
Formation of brominated phenol
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C.
Formation of phenyl ether
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D.
Formation of phenol red
Solution
Phenols react with bromine water to form brominated phenols, which are usually colorless or pale yellow.
Correct Answer: B — Formation of brominated phenol
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Q. What is the main reaction of phenols with sodium hydroxide? (2020)
-
A.
Formation of sodium phenoxide
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B.
Formation of ether
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C.
Formation of alcohol
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D.
Formation of ketone
Solution
Phenols react with sodium hydroxide to form sodium phenoxide, which is a salt of phenol.
Correct Answer: A — Formation of sodium phenoxide
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Q. What is the main type of reaction that haloalkanes undergo? (2020)
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A.
Addition
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B.
Substitution
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C.
Elimination
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D.
Redox
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?
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A.
Preservative
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B.
Flavoring agent
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C.
Cleaning agent
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D.
All of the above
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 major product when 1-bromobutane reacts with sodium ethoxide? (2021)
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A.
Butane
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B.
Ethyl butyl ether
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C.
1-butanol
-
D.
2-butanol
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?
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A.
But-1-ene
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B.
But-2-ene
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C.
Butane
-
D.
No reaction
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 mass of 3 moles of NaCl? (2020) 2020
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A.
87 g
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B.
58.5 g
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C.
174 g
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D.
3 g
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
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B.
117 g
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C.
175.5 g
-
D.
29.25 g
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
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C.
10 g
-
D.
30 g
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)
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A.
58.44 g
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B.
174.32 g
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C.
29.22 g
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D.
87.16 g
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
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B.
10 g
-
C.
1 g
-
D.
2 g
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
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%
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B.
90%
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C.
50%
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D.
20%
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 maximum area of a triangle with a base of 10 cm and height as a function of x? (2020)
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)
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 units and height as a function of x? (2020)
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 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
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
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)
Solution
The maximum height occurs at t = -b/(2a) = 1. h(1) = 64.
Correct Answer: B — 64
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