Q. What is the main storage form of carbohydrates in animals?
-
A.
Starch
-
B.
Glycogen
-
C.
Cellulose
-
D.
Chitin
Solution
Glycogen is the main storage form of carbohydrates in animals, while starch is the storage form in plants.
Correct Answer: B — Glycogen
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Q. What is the main structural component of plant cell walls?
-
A.
Starch
-
B.
Glycogen
-
C.
Cellulose
-
D.
Chitin
Solution
Cellulose is the main structural component of plant cell walls.
Correct Answer: C — Cellulose
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Q. What is the main type of isomerism exhibited by butene (C4H8)?
-
A.
Structural isomerism
-
B.
Geometric isomerism
-
C.
Optical isomerism
-
D.
Functional isomerism
Solution
Butene exhibits geometric isomerism due to the presence of a double bond, allowing for cis and trans configurations.
Correct Answer: B — Geometric isomerism
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Q. What is the main type of reaction that alkanes undergo?
-
A.
Addition
-
B.
Substitution
-
C.
Elimination
-
D.
Condensation
Solution
Alkanes primarily undergo substitution reactions, especially in the presence of halogens.
Correct Answer: B — Substitution
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Q. What is the main use of hydrogen in the Haber process?
-
A.
To produce ammonia
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B.
To produce water
-
C.
To produce hydrogen peroxide
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D.
To produce methane
Solution
In the Haber process, hydrogen is used to produce ammonia (NH3).
Correct Answer: A — To produce ammonia
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Q. What is the main use of polycarbonate?
-
A.
Insulation
-
B.
Optical lenses
-
C.
Textiles
-
D.
Adhesives
Solution
Polycarbonate is primarily used in the production of optical lenses due to its clarity and strength.
Correct Answer: B — Optical lenses
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Q. What is the main use of polyvinyl chloride (PVC)?
-
A.
Insulation
-
B.
Pipes and fittings
-
C.
Textiles
-
D.
Adhesives
Solution
Polyvinyl chloride (PVC) is primarily used in pipes and fittings due to its durability.
Correct Answer: B — Pipes and fittings
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Q. What is the major product of the hydration of propene?
-
A.
Propan-1-ol
-
B.
Propan-2-ol
-
C.
Butanol
-
D.
Ethylene glycol
Solution
The major product of the hydration of propene is propan-2-ol due to Markovnikov's rule.
Correct Answer: B — Propan-2-ol
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Q. What is the major product of the reaction between 1-bromo-2-methylpropane and sodium ethoxide?
-
A.
1-ethoxy-2-methylpropane
-
B.
2-ethoxy-2-methylpropane
-
C.
1-bromo-2-ethoxypropane
-
D.
2-bromo-2-methylpropane
Solution
The reaction is an SN2 reaction leading to the formation of 1-ethoxy-2-methylpropane.
Correct Answer: B — 2-ethoxy-2-methylpropane
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Q. What is the major product of the reaction between 1-bromobutane and sodium ethoxide in ethanol?
-
A.
1-ethoxybutane
-
B.
2-ethoxybutane
-
C.
butane
-
D.
no reaction
Solution
The reaction is an example of an SN2 reaction, where sodium ethoxide acts as a nucleophile, leading to the formation of 1-ethoxybutane.
Correct Answer: B — 2-ethoxybutane
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Q. What is the major product of the reaction between 1-bromobutane and sodium hydroxide in ethanol?
-
A.
1-butanol
-
B.
2-butanol
-
C.
butyl bromide
-
D.
butyl ether
Solution
The reaction leads to the formation of 1-butanol through an SN2 mechanism.
Correct Answer: B — 2-butanol
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Q. What is the major product of the reaction between chlorobenzene and sodium hydroxide at high temperature?
-
A.
Phenol
-
B.
Benzene
-
C.
Chlorobenzene
-
D.
Sodium phenoxide
Solution
The reaction of chlorobenzene with sodium hydroxide at high temperature leads to the formation of phenol through nucleophilic substitution.
Correct Answer: A — Phenol
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Q. What is the major product of the reaction of 1-bromobutane with sodium ethoxide in ethanol?
-
A.
1-butene
-
B.
2-butene
-
C.
butane
-
D.
no reaction
Solution
The reaction proceeds via an elimination mechanism (E2) leading to the formation of 2-butene as the major product.
Correct Answer: B — 2-butene
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Q. What is the major product of the reaction of 1-bromobutane with sodium ethoxide?
-
A.
Butane
-
B.
Ethyl butyl ether
-
C.
1-butene
-
D.
2-butene
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 of the reaction of 1-butene with HBr?
-
A.
1-bromobutane
-
B.
2-bromobutane
-
C.
Butane
-
D.
Bromobenzene
Solution
The major product of the reaction of 1-butene with HBr is 2-bromobutane due to Markovnikov's rule.
Correct Answer: B — 2-bromobutane
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Q. What is the major product of the reaction of 2-butyne with H2 in the presence of a catalyst?
-
A.
1-butyne
-
B.
butane
-
C.
2-butyne
-
D.
3-butyne
Solution
The major product of hydrogenation of 2-butyne is butane.
Correct Answer: B — butane
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Q. What is the major product of the reaction of propene with HBr?
-
A.
1-Bromopropane
-
B.
2-Bromopropane
-
C.
Propyl bromide
-
D.
Bromopropene
Solution
The major product of the reaction of propene with HBr is 2-bromopropane due to Markovnikov's rule.
Correct Answer: B — 2-Bromopropane
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Q. What is the major product when 1-bromobutane reacts with sodium ethoxide in ethanol?
-
A.
1-ethoxybutane
-
B.
2-ethoxybutane
-
C.
butane
-
D.
butyl ethyl ether
Solution
The reaction is an example of an SN2 reaction, leading to the formation of 1-ethoxybutane.
Correct Answer: A — 1-ethoxybutane
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Q. What is the major product when propene is treated with bromine?
-
A.
1-bromopropane
-
B.
2-bromopropane
-
C.
Bromopropane
-
D.
No reaction
Solution
The major product of the reaction of propene with bromine is 2-bromopropane due to anti-addition.
Correct Answer: B — 2-bromopropane
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Q. What is the major product when propene reacts with HBr?
-
A.
1-Bromopropane
-
B.
2-Bromopropane
-
C.
Propyl bromide
-
D.
Bromopropene
Solution
The major product of the reaction of propene with HBr is 2-Bromopropane due to Markovnikov's rule.
Correct Answer: B — 2-Bromopropane
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Q. What is the majority charge carrier in a P-type semiconductor?
-
A.
Electrons
-
B.
Holes
-
C.
Neutrons
-
D.
Protons
Solution
In a P-type semiconductor, holes are the majority charge carriers.
Correct Answer: B — Holes
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Q. What is the mass defect in a nucleus?
-
A.
The difference between the mass of the nucleus and the sum of the masses of its nucleons
-
B.
The mass of the nucleus itself
-
C.
The mass of the electrons surrounding the nucleus
-
D.
The mass of the binding energy
Solution
The mass defect is the difference between the mass of the nucleus and the sum of the masses of its individual nucleons.
Correct Answer: A — The difference between the mass of the nucleus and the sum of the masses of its nucleons
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Q. What is the mass of 0.25 moles of glucose (C6H12O6)? (Molar mass = 180 g/mol)
-
A.
45 g
-
B.
90 g
-
C.
60 g
-
D.
75 g
Solution
Mass = moles × molar mass = 0.25 moles × 180 g/mol = 45 g.
Correct Answer: B — 90 g
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Q. What is the mass of 0.5 moles of CaCO3?
-
A.
50 g
-
B.
25 g
-
C.
100 g
-
D.
75 g
Solution
Molar mass of CaCO3 = 40 + 12 + 16*3 = 100 g/mol. Mass = moles x molar mass = 0.5 moles x 100 g/mol = 50 g.
Correct Answer: B — 25 g
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Q. What is the mass of 0.5 moles of NaCl?
-
A.
29 g
-
B.
58 g
-
C.
14 g
-
D.
0.5 g
Solution
Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol. Mass = moles x molar mass = 0.5 moles x 58.5 g/mol = 29.25 g.
Correct Answer: A — 29 g
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Q. What is the mass of 0.5 moles of sodium chloride (NaCl)?
-
A.
29 g
-
B.
35 g
-
C.
58 g
-
D.
70 g
Solution
The molar mass of NaCl is 58 g/mol. Therefore, 0.5 moles of NaCl = 0.5 x 58 g = 29 g.
Correct Answer: C — 58 g
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Q. What is the mass of 0.75 moles of sulfuric acid (H2SO4)?
-
A.
75 g
-
B.
98 g
-
C.
147 g
-
D.
50 g
Solution
Molar mass of H2SO4 = 2*1 + 32 + 4*16 = 98 g/mol. Mass = moles x molar mass = 0.75 moles x 98 g/mol = 73.5 g.
Correct Answer: B — 98 g
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Q. What is the mass of 1 mole of water (H2O)?
-
A.
18 g
-
B.
16 g
-
C.
20 g
-
D.
22 g
Solution
The molar mass of water (H2O) is 18 g/mol (2*1 for H + 16 for O).
Correct Answer: A — 18 g
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Q. What is the mass of 2 moles of carbon dioxide (CO2)?
-
A.
44 g
-
B.
22 g
-
C.
88 g
-
D.
66 g
Solution
The molar mass of CO2 is 12 g/mol (C) + 16 g/mol x 2 (O) = 44 g/mol. Therefore, 2 moles of CO2 weigh 2 x 44 g = 88 g.
Correct Answer: A — 44 g
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Q. What is the mass of 2 moles of sulfuric acid (H2SO4)?
-
A.
98 g
-
B.
196 g
-
C.
294 g
-
D.
392 g
Solution
Molar mass of H2SO4 = 2*1 + 32 + 4*16 = 98 g/mol. Mass = 2 moles x 98 g/mol = 196 g.
Correct Answer: B — 196 g
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