Q. What is the primary structural component of plant cell walls?
A.
Starch
B.
Glycogen
C.
Cellulose
D.
Chitin
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Solution
Cellulose is the primary structural component of plant cell walls, providing rigidity and strength.
Correct Answer: C — Cellulose
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Q. What is the primary structure of a polymer determined by?
A.
The arrangement of monomers
B.
The molecular weight
C.
The type of bonds
D.
The color of the polymer
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Solution
The primary structure of a polymer is determined by the arrangement of its monomers.
Correct Answer: A — The arrangement of monomers
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Q. What is the primary structure of a protein determined by?
A.
Hydrogen bonds
B.
Ionic bonds
C.
Peptide bonds
D.
Disulfide bridges
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Solution
The primary structure of a protein is determined by the sequence of amino acids linked by peptide bonds.
Correct Answer: C — Peptide bonds
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Q. What is the primary structure of a protein?
A.
The sequence of amino acids
B.
The folding of the polypeptide chain
C.
The arrangement of multiple polypeptide chains
D.
The interaction between side chains
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Solution
The primary structure of a protein refers to the linear sequence of amino acids in the polypeptide chain.
Correct Answer: A — The sequence of amino acids
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Q. What is the primary type of bonding in diamond?
A.
Ionic
B.
Covalent
C.
Metallic
D.
Hydrogen
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Solution
Diamond consists of a three-dimensional network of covalent bonds between carbon atoms.
Correct Answer: B — Covalent
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Q. What is the primary type of bonding in ionic compounds?
A.
Covalent bonding
B.
Ionic bonding
C.
Metallic bonding
D.
Hydrogen bonding
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Solution
Ionic compounds are primarily held together by ionic bonding.
Correct Answer: B — Ionic bonding
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Q. What is the primary type of bonding in polymers?
A.
Ionic bonding
B.
Covalent bonding
C.
Metallic bonding
D.
Hydrogen bonding
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Solution
Covalent bonding is the primary type of bonding in polymers, linking monomers together.
Correct Answer: B — Covalent bonding
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Q. What is the primary type of bonding in sodium chloride (NaCl)?
A.
Covalent
B.
Ionic
C.
Metallic
D.
Hydrogen
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Solution
Sodium chloride is primarily held together by ionic bonds formed between Na+ and Cl- ions.
Correct Answer: B — Ionic
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Q. What is the primary type of decay for an unstable nucleus with too many protons?
A.
Alpha decay
B.
Beta decay
C.
Gamma decay
D.
Positron emission
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Solution
An unstable nucleus with too many protons typically undergoes alpha decay, where it emits an alpha particle (2 protons and 2 neutrons) to become more stable.
Correct Answer: A — Alpha decay
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Q. What is the primary type of radiation emitted by uranium-238?
A.
Alpha radiation
B.
Beta radiation
C.
Gamma radiation
D.
X-rays
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Solution
Uranium-238 primarily emits alpha radiation during its decay process.
Correct Answer: A — Alpha radiation
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Q. What is the primary type of radiation emitted during alpha decay?
A.
Helium nucleus
B.
Electron
C.
Photon
D.
Neutrino
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Solution
During alpha decay, an alpha particle, which is a helium nucleus (2 protons and 2 neutrons), is emitted.
Correct Answer: A — Helium nucleus
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Q. What is the primary type of reaction that alkanes undergo?
A.
Addition
B.
Substitution
C.
Elimination
D.
Condensation
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Solution
Alkanes primarily undergo substitution reactions.
Correct Answer: B — Substitution
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Q. What is the primary use of a Wheatstone bridge in practical applications?
A.
To measure voltage
B.
To measure current
C.
To measure resistance
D.
To measure power
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Solution
The primary use of a Wheatstone bridge is to measure unknown resistances by balancing it against known resistances.
Correct Answer: C — To measure resistance
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Q. What is the primary use of amines in industry?
A.
Solvents
B.
Fertilizers
C.
Dyes
D.
All of the above
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Solution
Amines are used in various industries for solvents, fertilizers, dyes, and more.
Correct Answer: D — All of the above
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Q. What is the primary use of antihistamines?
A.
To treat infections
B.
To relieve allergy symptoms
C.
To reduce fever
D.
To promote sleep
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Solution
Antihistamines are primarily used to relieve symptoms of allergies.
Correct Answer: B — To relieve allergy symptoms
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Q. What is the primary use of baking soda in cooking?
A.
Flavor enhancer
B.
Leavening agent
C.
Preservative
D.
Coloring agent
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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 use of barium sulfate?
A.
As a contrast agent in X-ray imaging
B.
In fireworks
C.
As a fertilizer
D.
In batteries
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Solution
Barium sulfate is primarily used as a contrast agent in X-ray imaging.
Correct Answer: A — As a contrast agent in X-ray imaging
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Q. What is the primary use of boron in industry?
A.
Fertilizers
B.
Glass production
C.
Metallurgy
D.
Pharmaceuticals
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Solution
Boron is primarily used in glass production due to its ability to improve thermal and chemical resistance.
Correct Answer: B — Glass production
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Q. What is the primary use of calcium in the industry?
A.
As a reducing agent
B.
In the production of cement
C.
In batteries
D.
As a fertilizer
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Solution
Calcium is primarily used in the production of cement.
Correct Answer: B — In the production of cement
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Q. What is the primary use of chlorine in water treatment?
A.
To increase pH
B.
To remove hardness
C.
As a disinfectant
D.
To add minerals
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Solution
Chlorine is primarily used as a disinfectant in water treatment.
Correct Answer: C — As a disinfectant
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Q. What is the primary use of citric acid in food?
A.
Preservative
B.
Flavor enhancer
C.
Thickener
D.
Coloring agent
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Solution
Citric acid is commonly used as a flavor enhancer in food products.
Correct Answer: B — Flavor enhancer
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Q. What is the primary use of ethanol in everyday life?
A.
Fuel
B.
Solvent
C.
Antiseptic
D.
All of the above
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Solution
Ethanol is used as a fuel, solvent, and antiseptic in various applications.
Correct Answer: D — All of the above
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Q. What is the primary use of hydrogen in the industry?
A.
Fertilizers
B.
Fuel cells
C.
Plastics
D.
Glass production
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Solution
Hydrogen is primarily used in fuel cells for energy production.
Correct Answer: B — Fuel cells
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Q. What is the primary use of nuclear fission in power plants?
A.
To produce nuclear weapons
B.
To generate heat for electricity
C.
To create isotopes for medical use
D.
To study nuclear reactions
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Solution
Nuclear fission is primarily used in power plants to generate heat, which is then converted into electricity.
Correct Answer: B — To generate heat for electricity
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Q. What is the primary use of nuclear fission?
A.
Medical imaging
B.
Nuclear power generation
C.
Smoke detectors
D.
Radiocarbon dating
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Solution
Nuclear fission is primarily used for nuclear power generation.
Correct Answer: B — Nuclear power generation
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Q. What is the primary use of nuclear reactors?
A.
To produce nuclear weapons
B.
To generate electricity
C.
To create isotopes for medical use
D.
To study nuclear physics
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Solution
The primary use of nuclear reactors is to generate electricity through controlled nuclear fission.
Correct Answer: B — To generate electricity
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Q. What is the primary use of polarizers in photography?
A.
To increase brightness
B.
To reduce glare
C.
To enhance colors
D.
To focus light
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Solution
Polarizers are primarily used in photography to reduce glare from reflective surfaces.
Correct Answer: B — To reduce glare
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Q. What is the primary use of potassium in agriculture?
A.
Fertilizer
B.
Pesticide
C.
Herbicide
D.
Soil conditioner
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Solution
Potassium is primarily used as a fertilizer in agriculture.
Correct Answer: A — Fertilizer
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Q. What is the primary use of radioactive isotopes in medicine?
A.
Energy production
B.
Diagnostic imaging
C.
Food preservation
D.
Industrial applications
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Solution
Radioactive isotopes are primarily used in medicine for diagnostic imaging and treatment.
Correct Answer: B — Diagnostic imaging
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Q. What is the primary use of silicon in the industry?
A.
Fertilizers
B.
Semiconductors
C.
Glass production
D.
Alloys
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Solution
Silicon is primarily used in the semiconductor industry.
Correct Answer: B — Semiconductors
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