Q. What is the main advantage of using polymers in manufacturing?
-
A.
High melting point
-
B.
Lightweight
-
C.
High electrical conductivity
-
D.
Brittleness
Solution
Polymers are lightweight, making them advantageous for various manufacturing applications.
Correct Answer: B — Lightweight
Learn More →
Q. What is the main characteristic of geometric isomers?
-
A.
Different connectivity
-
B.
Different spatial arrangement
-
C.
Different molecular formula
-
D.
Different functional groups
Solution
Geometric isomers have the same connectivity but differ in the spatial arrangement of groups around a double bond.
Correct Answer: B — Different spatial arrangement
Learn More →
Q. What is the main characteristic of optical isomers?
-
A.
Different boiling points
-
B.
Different melting points
-
C.
Different optical activities
-
D.
Different molecular weights
Solution
Optical isomers differ in their ability to rotate plane-polarized light.
Correct Answer: C — Different optical activities
Learn More →
Q. What is the main component of cell membranes?
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Phospholipids
-
D.
Nucleic acids
Solution
Phospholipids are the main component of cell membranes, forming a bilayer.
Correct Answer: C — Phospholipids
Learn More →
Q. What is the main component of the cell membrane?
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Phospholipids
-
D.
Nucleic acids
Solution
Phospholipids are the main component of cell membranes, forming a bilayer.
Correct Answer: C — Phospholipids
Learn More →
Q. What is the main component of vinegar?
-
A.
Acetic acid
-
B.
Citric acid
-
C.
Lactic acid
-
D.
Formic acid
Solution
Vinegar primarily consists of acetic acid, which gives it its sour taste.
Correct Answer: A — Acetic acid
Learn More →
Q. What is the main difference between aldehydes and ketones?
-
A.
Position of the carbonyl group
-
B.
Number of carbon atoms
-
C.
Presence of hydrogen
-
D.
All of the above
Solution
The main difference is the position of the carbonyl group; aldehydes have it at the end of the carbon chain, while ketones have it within the chain.
Correct Answer: A — Position of the carbonyl group
Learn More →
Q. What is the main feature of a primary alcohol?
-
A.
The hydroxyl group is attached to a carbon with one alkyl group
-
B.
The hydroxyl group is attached to a carbon with two alkyl groups
-
C.
The hydroxyl group is attached to a carbon with three alkyl groups
-
D.
The hydroxyl group is attached to a carbon in a ring
Solution
A primary alcohol has the hydroxyl group (-OH) attached to a carbon atom that is bonded to only one other carbon atom.
Correct Answer: A — The hydroxyl group is attached to a carbon with one alkyl group
Learn More →
Q. What is the main feature of addition polymerization?
-
A.
Involves the loss of small molecules
-
B.
Involves the addition of monomers without by-products
-
C.
Requires a catalyst
-
D.
Involves the formation of cross-linked structures
Solution
Addition polymerization involves the addition of monomers to form a polymer without the loss of small molecules.
Correct Answer: B — Involves the addition of monomers without by-products
Learn More →
Q. What is the main feature of addition polymers?
-
A.
They release small molecules during polymerization
-
B.
They are formed from monomers with double bonds
-
C.
They have a high degree of crystallinity
-
D.
They are always biodegradable
Solution
Addition polymers are formed from monomers that contain double bonds, which open up to form long chains.
Correct Answer: B — They are formed from monomers with double bonds
Learn More →
Q. What is the main feature of aromatic compounds?
-
A.
Presence of double bonds
-
B.
Presence of a benzene ring
-
C.
Presence of hydroxyl groups
-
D.
Presence of carboxylic groups
Solution
Aromatic compounds are characterized by the presence of a benzene ring.
Correct Answer: B — Presence of a benzene ring
Learn More →
Q. What is the main feature of condensation polymerization?
-
A.
It produces small molecules as byproducts
-
B.
It requires high temperatures
-
C.
It involves ionic bonds
-
D.
It is a reversible reaction
Solution
Condensation polymerization produces small molecules, such as water, as byproducts.
Correct Answer: A — It produces small molecules as byproducts
Learn More →
Q. What is the main feature of elastomers?
-
A.
High tensile strength
-
B.
Elasticity
-
C.
Brittleness
-
D.
Thermal stability
Solution
Elastomers are characterized by their elasticity, allowing them to stretch and return to their original shape.
Correct Answer: B — Elasticity
Learn More →
Q. What is the main feature of terminal alkynes?
-
A.
They have a triple bond in the middle
-
B.
They can form carbanions
-
C.
They are less acidic than alkenes
-
D.
They cannot undergo substitution reactions
Solution
Terminal alkynes can form carbanions due to the acidity of the hydrogen atom attached to the sp-hybridized carbon.
Correct Answer: B — They can form carbanions
Learn More →
Q. What is the main feature that distinguishes alkynes from alkenes?
-
A.
Presence of double bonds
-
B.
Presence of triple bonds
-
C.
Saturation
-
D.
Molecular weight
Solution
Alkynes are distinguished from alkenes by the presence of triple bonds.
Correct Answer: B — Presence of triple bonds
Learn More →
Q. What is the main function of carbohydrates in living organisms?
-
A.
Genetic information
-
B.
Energy storage
-
C.
Catalysis
-
D.
Structural support
Solution
The main function of carbohydrates is energy storage and providing energy to living organisms.
Correct Answer: B — Energy storage
Learn More →
Q. What is the main function of lipids in biological systems?
-
A.
Energy storage
-
B.
Genetic information
-
C.
Catalysis
-
D.
Structural support
Solution
Lipids primarily function in energy storage, as well as forming cell membranes.
Correct Answer: A — Energy storage
Learn More →
Q. What is the main ingredient in most sunscreens?
-
A.
Zinc oxide
-
B.
Vitamin E
-
C.
Aloe vera
-
D.
Coconut oil
Solution
Zinc oxide is a common active ingredient in sunscreens that protects against UV rays.
Correct Answer: A — Zinc oxide
Learn More →
Q. What is the main ingredient in vinegar that gives it its sour taste?
-
A.
Acetic acid
-
B.
Citric acid
-
C.
Lactic acid
-
D.
Formic acid
Solution
Vinegar contains acetic acid, which is responsible for its sour taste.
Correct Answer: A — Acetic acid
Learn More →
Q. What is the main ingredient in vinegar?
-
A.
Acetic acid
-
B.
Citric acid
-
C.
Lactic acid
-
D.
Formic acid
Solution
Vinegar primarily consists of acetic acid, which gives it its sour taste.
Correct Answer: A — Acetic acid
Learn More →
Q. What is the main monomer used to produce polyethylene?
-
A.
Propylene
-
B.
Ethylene
-
C.
Butylene
-
D.
Styrene
Solution
Ethylene is the main monomer used to produce polyethylene through addition polymerization.
Correct Answer: B — Ethylene
Learn More →
Q. What is the main product of the complete combustion of alkanes?
-
A.
Carbon monoxide
-
B.
Carbon dioxide
-
C.
Water
-
D.
Oxygen
Solution
The main products of the complete combustion of alkanes are carbon dioxide and water.
Correct Answer: B — Carbon dioxide
Learn More →
Q. What is the main product of the complete combustion of hydrocarbons?
-
A.
Carbon monoxide
-
B.
Water
-
C.
Carbon dioxide
-
D.
Hydrogen gas
Solution
The complete combustion of hydrocarbons produces carbon dioxide and water.
Correct Answer: C — Carbon dioxide
Learn More →
Q. What is the main product of the complete combustion of propane (C3H8)?
-
A.
Carbon monoxide
-
B.
Carbon dioxide and water
-
C.
Soot
-
D.
Hydrogen gas
Solution
The complete combustion of propane produces carbon dioxide and water.
Correct Answer: B — Carbon dioxide and water
Learn More →
Q. What is the main product of the dehydration of an alcohol?
-
A.
Alkene
-
B.
Alkane
-
C.
Aldehyde
-
D.
Ketone
Solution
The dehydration of an alcohol typically yields an alkene.
Correct Answer: A — Alkene
Learn More →
Q. What is the main product of the dehydration of ethanol?
-
A.
Ethylene
-
B.
Acetaldehyde
-
C.
Ethane
-
D.
Diethyl ether
Solution
The dehydration of ethanol primarily produces ethylene (ethene) through the elimination of water.
Correct Answer: A — Ethylene
Learn More →
Q. What is the main product of the hydrogenation of benzene?
-
A.
Cyclohexane
-
B.
Toluene
-
C.
Phenol
-
D.
Benzaldehyde
Solution
The hydrogenation of benzene results in the formation of cyclohexane, a saturated hydrocarbon.
Correct Answer: A — Cyclohexane
Learn More →
Q. What is the main product of the nitration of benzene?
-
A.
Nitrobenzene
-
B.
Benzene-1,2-diol
-
C.
Benzaldehyde
-
D.
Benzyl alcohol
Solution
The nitration of benzene typically produces nitrobenzene as the main product through electrophilic substitution.
Correct Answer: A — Nitrobenzene
Learn More →
Q. What is the main product of the oxidation of a primary alcohol?
-
A.
Aldehyde
-
B.
Ketone
-
C.
Carboxylic acid
-
D.
Alcohol
Solution
Oxidation of a primary alcohol typically leads to the formation of a carboxylic acid.
Correct Answer: C — Carboxylic acid
Learn More →
Q. What is the main product of the reaction between an alcohol and a carboxylic acid?
-
A.
Ester
-
B.
Ether
-
C.
Aldehyde
-
D.
Ketone
Solution
The reaction between an alcohol and a carboxylic acid typically produces an ester.
Correct Answer: A — Ester
Learn More →
Showing 151 to 180 of 951 (32 Pages)