Q. What type of reaction occurs when phenol is treated with sodium metal?
-
A.
Oxidation
-
B.
Reduction
-
C.
Esterification
-
D.
Wurtz reaction
Solution
The reaction of phenol with sodium metal leads to the formation of biphenyl through the Wurtz reaction.
Correct Answer: D — Wurtz reaction
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Q. What type of reaction occurs when two amino acids form a peptide bond?
-
A.
Hydrolysis
-
B.
Condensation
-
C.
Redox
-
D.
Substitution
Solution
The formation of a peptide bond between two amino acids is a condensation reaction, releasing water.
Correct Answer: B — Condensation
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Q. What type of structure do cross-linked polymers have?
-
A.
Linear
-
B.
Branched
-
C.
Network
-
D.
Cyclic
Solution
Cross-linked polymers have a network structure due to the presence of covalent bonds between chains.
Correct Answer: C — Network
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Q. What type of structure do most synthetic polymers have?
-
A.
Linear
-
B.
Branched
-
C.
Cross-linked
-
D.
All of the above
Solution
Most synthetic polymers can have linear, branched, or cross-linked structures depending on their synthesis.
Correct Answer: D — All of the above
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Q. What type of structure do most thermoplastics have?
-
A.
Cross-linked structure
-
B.
Linear or branched structure
-
C.
Crystalline structure
-
D.
Amorphous structure
Solution
Most thermoplastics have a linear or branched structure, allowing them to be remolded upon heating.
Correct Answer: B — Linear or branched structure
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Q. Which alkane is used as a fuel in lighters?
-
A.
Methane
-
B.
Ethane
-
C.
Butane
-
D.
Propane
Solution
Butane is commonly used as a fuel in lighters.
Correct Answer: C — Butane
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Q. Which alkane is used as a refrigerant?
-
A.
Methane
-
B.
Ethane
-
C.
Propane
-
D.
Butane
Solution
Propane is commonly used as a refrigerant due to its favorable thermodynamic properties.
Correct Answer: C — Propane
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Q. Which amine is expected to have the highest boiling point?
-
A.
Methylamine
-
B.
Ethylamine
-
C.
Dimethylamine
-
D.
Trimethylamine
Solution
Ethylamine has the highest boiling point due to its ability to form stronger hydrogen bonds compared to the others.
Correct Answer: B — Ethylamine
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Q. Which amine is known for its strong fishy odor?
-
A.
Methylamine
-
B.
Ethylamine
-
C.
Trimethylamine
-
D.
Aniline
Solution
Trimethylamine is known for its strong fishy odor, often associated with decaying fish.
Correct Answer: C — Trimethylamine
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Q. Which amine is most likely to undergo electrophilic aromatic substitution?
-
A.
Aniline
-
B.
Methylamine
-
C.
Dimethylamine
-
D.
Triethylamine
Solution
Aniline is most likely to undergo electrophilic aromatic substitution due to the presence of the amino group, which is a strong activating group.
Correct Answer: A — Aniline
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Q. Which amine is most soluble in water?
-
A.
Triethylamine
-
B.
Methylamine
-
C.
Aniline
-
D.
Benzylamine
Solution
Methylamine is the most soluble in water due to its smaller size and ability to form hydrogen bonds.
Correct Answer: B — Methylamine
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Q. Which amine is used as a local anesthetic?
-
A.
Lidocaine
-
B.
Aniline
-
C.
Methylamine
-
D.
Ethylamine
Solution
Lidocaine is an amine used as a local anesthetic.
Correct Answer: A — Lidocaine
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Q. Which amine is used as a solvent in organic reactions?
-
A.
Aniline
-
B.
Triethylamine
-
C.
Methylamine
-
D.
Pyridine
Solution
Triethylamine is commonly used as a solvent in organic reactions.
Correct Answer: B — Triethylamine
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Q. Which biomolecule carries genetic information?
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Lipids
-
D.
Nucleic acids
Solution
Nucleic acids, such as DNA and RNA, are responsible for carrying genetic information.
Correct Answer: D — Nucleic acids
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Q. Which biomolecule is primarily involved in cell membrane structure?
-
A.
Carbohydrates
-
B.
Proteins
-
C.
Nucleic acids
-
D.
Lipids
Solution
Lipids, particularly phospholipids, are the main components of cell membranes.
Correct Answer: D — Lipids
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Q. Which biomolecule is primarily involved in energy transfer within cells?
-
A.
DNA
-
B.
RNA
-
C.
ATP
-
D.
Proteins
Solution
ATP (adenosine triphosphate) is the primary energy carrier in cells.
Correct Answer: C — ATP
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Q. Which biomolecule is primarily involved in genetic information storage?
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Lipids
-
D.
Nucleic acids
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer: D — Nucleic acids
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Q. Which biomolecule is primarily responsible for energy storage in animals?
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Lipids
-
D.
Nucleic acids
Solution
Lipids, particularly triglycerides, are the main form of energy storage in animals.
Correct Answer: C — Lipids
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Q. Which biomolecule is primarily responsible for storing genetic information?
-
A.
Proteins
-
B.
Lipids
-
C.
Carbohydrates
-
D.
Nucleic acids
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer: D — Nucleic acids
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Q. Which biomolecule is primarily responsible for the genetic information in cells?
-
A.
Proteins
-
B.
Lipids
-
C.
Nucleic acids
-
D.
Carbohydrates
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer: C — Nucleic acids
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Q. Which biomolecule is primarily responsible for the storage of genetic information?
-
A.
Proteins
-
B.
Lipids
-
C.
Nucleic acids
-
D.
Carbohydrates
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer: C — Nucleic acids
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Q. Which biomolecule is primarily responsible for the structure of cell membranes?
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Nucleic acids
-
D.
Lipids
Solution
Lipids, particularly phospholipids, are the main components of cell membranes.
Correct Answer: D — Lipids
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Q. Which biomolecule is used for energy storage in animals?
-
A.
Glycogen
-
B.
Cellulose
-
C.
Starch
-
D.
Chitin
Solution
Glycogen is the primary form of energy storage in animals.
Correct Answer: A — Glycogen
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Q. Which biomolecule is used for quick energy?
-
A.
Proteins
-
B.
Lipids
-
C.
Carbohydrates
-
D.
Nucleic acids
Solution
Carbohydrates are primarily used for quick energy by living organisms.
Correct Answer: C — Carbohydrates
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Q. Which biomolecule serves as the main component of cell membranes?
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Nucleic acids
-
D.
Phospholipids
Solution
Phospholipids are the main component of cell membranes, forming a bilayer structure.
Correct Answer: D — Phospholipids
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Q. Which bond is primarily responsible for the secondary structure of proteins?
-
A.
Ionic bonds
-
B.
Hydrogen bonds
-
C.
Disulfide bonds
-
D.
Peptide bonds
Solution
The secondary structure of proteins, such as alpha-helices and beta-sheets, is stabilized by hydrogen bonds between the backbone atoms.
Correct Answer: B — Hydrogen bonds
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Q. Which carbohydrate is a structural component of plant cell walls?
-
A.
Starch
-
B.
Glycogen
-
C.
Cellulose
-
D.
Fructose
Solution
Cellulose is a polysaccharide that provides structural support in plant cell walls.
Correct Answer: C — Cellulose
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Q. Which carbohydrate is commonly used as a sweetener?
-
A.
Lactose
-
B.
Maltose
-
C.
Fructose
-
D.
Cellulose
Solution
Fructose is commonly used as a sweetener due to its high sweetness level.
Correct Answer: C — Fructose
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Q. Which carbohydrate is found in milk?
-
A.
Lactose
-
B.
Maltose
-
C.
Glucose
-
D.
Fructose
Solution
Lactose is the sugar found in milk, composed of glucose and galactose.
Correct Answer: A — Lactose
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Q. Which carbohydrate is found in the structure of DNA?
-
A.
Glucose
-
B.
Ribose
-
C.
Fructose
-
D.
Mannose
Solution
Ribose is the sugar component of RNA, while deoxyribose is found in DNA.
Correct Answer: B — Ribose
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