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 molecular formula of benzene?
-
A.
C6H6
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B.
C6H12
-
C.
C6H10
-
D.
C6H8
Solution
Benzene has the molecular formula C6H6, indicating it is an aromatic hydrocarbon.
Correct Answer: A — C6H6
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Q. What is the molecular formula of ethylene?
-
A.
C2H2
-
B.
C2H4
-
C.
C3H6
-
D.
C4H8
Solution
Ethylene is an alkene with the molecular formula C2H4.
Correct Answer: B — C2H4
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Q. What is the molecular formula of fructose?
-
A.
C6H12O6
-
B.
C5H10O5
-
C.
C6H10O5
-
D.
C5H12O6
Solution
Fructose has the same molecular formula as glucose, which is C6H12O6.
Correct Answer: A — C6H12O6
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Q. What is the name of the reaction where benzene is converted to phenol?
-
A.
Hydrogenation
-
B.
Nitration
-
C.
Sulfonation
-
D.
Hydroxylation
Solution
The conversion of benzene to phenol is known as hydroxylation, typically involving the addition of a hydroxyl group (-OH) to the aromatic ring.
Correct Answer: D — Hydroxylation
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Q. What is the pKa value of acetic acid?
-
A.
4.76
-
B.
7.00
-
C.
9.25
-
D.
2.00
Solution
The pKa value of acetic acid is approximately 4.76.
Correct Answer: A — 4.76
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Q. What is the pKb value of a strong base?
-
A.
Less than 0
-
B.
Equal to 0
-
C.
Greater than 0
-
D.
Equal to 14
Solution
A strong base has a pKb value less than 0, indicating high basicity.
Correct Answer: A — Less than 0
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Q. What is the pKb value of a weak base?
-
A.
Less than 7
-
B.
Equal to 7
-
C.
Greater than 7
-
D.
None of the above
Solution
A weak base has a pKb value greater than 7.
Correct Answer: C — Greater than 7
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Q. What is the primary active ingredient in most antacids?
-
A.
Calcium carbonate
-
B.
Magnesium hydroxide
-
C.
Aluminum hydroxide
-
D.
All of the above
Solution
Most antacids contain active ingredients like calcium carbonate, magnesium hydroxide, or aluminum hydroxide to neutralize stomach acid.
Correct Answer: D — All of the above
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Q. What is the primary bond type in polymers?
-
A.
Ionic bonds
-
B.
Covalent bonds
-
C.
Metallic bonds
-
D.
Hydrogen bonds
Solution
Covalent bonds are the primary bond type in polymers, linking monomers together.
Correct Answer: B — Covalent bonds
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Q. What is the primary effect of a -CN group on a benzene ring?
-
A.
+M effect
-
B.
-M effect
-
C.
+I effect
-
D.
-I effect
Solution
-CN exhibits a -M effect as it withdraws electron density through resonance.
Correct Answer: B — -M effect
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Q. What is the primary effect of the -COOH group on a benzene ring?
-
A.
+M effect
-
B.
-M effect
-
C.
+I effect
-
D.
-I effect
Solution
The -COOH group primarily exhibits a -M effect as it withdraws electron density through resonance.
Correct Answer: B — -M effect
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Q. What is the primary effect of the -COOH group on aromatic compounds?
-
A.
+M effect
-
B.
-M effect
-
C.
+I effect
-
D.
-I effect
Solution
-COOH exhibits a -M effect as it withdraws electron density through resonance.
Correct Answer: B — -M effect
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Q. What is the primary effect of the inductive effect in organic compounds?
-
A.
Stabilization of positive charge
-
B.
Stabilization of negative charge
-
C.
Delocalization of electrons
-
D.
Formation of hydrogen bonds
Solution
The inductive effect involves the shifting of electron density through sigma bonds, which stabilizes positive charges.
Correct Answer: A — Stabilization of positive charge
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Q. What is the primary effect of the inductive effect in organic molecules?
-
A.
Stabilization of positive charge
-
B.
Stabilization of negative charge
-
C.
Delocalization of electrons
-
D.
Formation of hydrogen bonds
Solution
The inductive effect involves the shifting of electron density through sigma bonds, which can stabilize positive charges.
Correct Answer: A — Stabilization of positive charge
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Q. What is the primary function of antacids?
-
A.
To relieve pain
-
B.
To reduce acidity
-
C.
To increase appetite
-
D.
To promote digestion
Solution
Antacids are used to neutralize stomach acidity and relieve heartburn.
Correct Answer: B — To reduce acidity
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Q. What is the primary function of baking soda in cooking?
-
A.
Thickening agent
-
B.
Leavening agent
-
C.
Flavor enhancer
-
D.
Preservative
Solution
Baking soda acts as a leavening agent, helping baked goods rise by producing carbon dioxide when reacting with acids.
Correct Answer: B — Leavening agent
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Q. What is the primary function of carbohydrates in living organisms?
-
A.
Energy storage
-
B.
Genetic information
-
C.
Catalysis
-
D.
Structural support
Solution
Carbohydrates primarily serve as a source of energy in living organisms.
Correct Answer: A — Energy storage
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Q. What is the primary function of emulsifiers in food products?
-
A.
Thickeners
-
B.
Stabilizers
-
C.
Flavor enhancers
-
D.
Coloring agents
Solution
Emulsifiers help stabilize mixtures of oil and water, preventing separation.
Correct Answer: B — Stabilizers
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Q. What is the primary function of enzymes in biological systems?
-
A.
Store energy
-
B.
Speed up chemical reactions
-
C.
Provide structural support
-
D.
Transport molecules
Solution
Enzymes act as catalysts to speed up chemical reactions in biological systems.
Correct Answer: B — Speed up chemical reactions
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Q. What is the primary function of enzymes?
-
A.
Store energy
-
B.
Speed up chemical reactions
-
C.
Provide structure
-
D.
Transport substances
Solution
Enzymes are biological catalysts that speed up chemical reactions in the body.
Correct Answer: B — Speed up chemical reactions
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Q. What is the primary function of fluoride in dental care products?
-
A.
Whitening teeth
-
B.
Preventing cavities
-
C.
Freshening breath
-
D.
Strengthening gums
Solution
Fluoride helps to prevent cavities by strengthening tooth enamel and making it more resistant to decay.
Correct Answer: B — Preventing cavities
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Q. What is the primary function of fluoride in dental care?
-
A.
Whitening teeth
-
B.
Preventing cavities
-
C.
Strengthening enamel
-
D.
Reducing sensitivity
Solution
Fluoride helps to strengthen tooth enamel and prevent cavities.
Correct Answer: C — Strengthening enamel
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Q. What is the primary function of lipids in biological systems?
-
A.
Energy storage
-
B.
Catalysis
-
C.
Genetic information
-
D.
Structural support
Solution
Lipids serve as a major form of energy storage in organisms.
Correct Answer: A — Energy storage
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Q. What is the primary function of preservatives in food?
-
A.
Enhance flavor
-
B.
Improve texture
-
C.
Prevent spoilage
-
D.
Increase nutritional value
Solution
Preservatives are added to food to prevent spoilage caused by microorganisms.
Correct Answer: C — Prevent spoilage
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Q. What is the primary function of soap in cleaning?
-
A.
Disinfecting
-
B.
Emulsifying
-
C.
Oxidizing
-
D.
Reducing
Solution
Soap acts as an emulsifier, allowing water to mix with oils and dirt for effective cleaning.
Correct Answer: B — Emulsifying
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Q. What is the primary monomer used in the production of polyethylene?
-
A.
Propylene
-
B.
Ethylene
-
C.
Styrene
-
D.
Vinyl chloride
Solution
Polyethylene is primarily made from the polymerization of ethylene monomers.
Correct Answer: B — Ethylene
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