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 theme of the passage regarding climate change? (2023)
A.
The economic impact of climate change
B.
The role of technology in combating climate change
C.
The importance of individual action in addressing climate change
D.
The political implications of climate change
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Solution
The passage emphasizes how individual actions can collectively contribute to mitigating climate change.
Correct Answer:
C
— The importance of individual action in addressing climate change
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Q. What is the primary theme of the passage regarding the impact of technology on communication?
A.
Technology has improved communication significantly.
B.
Technology has led to a decline in face-to-face interactions.
C.
Technology has made communication more complex.
D.
Technology has no significant impact on communication.
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Solution
The passage discusses how technology, while enhancing connectivity, has reduced the quality of personal interactions.
Correct Answer:
B
— Technology has led to a decline in face-to-face interactions.
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Q. What is the primary tone of the passage regarding climate change?
A.
Optimistic
B.
Pessimistic
C.
Neutral
D.
Indifferent
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Solution
The passage highlights the severe consequences of climate change, indicating a pessimistic tone.
Correct Answer:
B
— Pessimistic
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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 metallic solids? (2020)
A.
Ionic bonding
B.
Covalent bonding
C.
Metallic bonding
D.
Hydrogen bonding
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Solution
Metallic solids are primarily held together by metallic bonding, which involves a 'sea of electrons' that are free to move.
Correct Answer:
C
— Metallic 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 compass in navigation? (2020)
A.
To measure distance
B.
To determine direction
C.
To calculate speed
D.
To find altitude
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Solution
The primary use of a compass in navigation is to determine direction.
Correct Answer:
B
— To determine direction
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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 aluminum in construction?
A.
Electrical wiring
B.
Structural components
C.
Piping
D.
Insulation
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Solution
Aluminum is widely used in structural components due to its strength-to-weight ratio.
Correct Answer:
B
— Structural components
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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 bioremediation? (2023)
A.
To produce biofuels
B.
To clean up environmental pollutants
C.
To enhance soil fertility
D.
To increase crop yield
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Solution
Bioremediation is primarily used to clean up environmental pollutants using microorganisms.
Correct Answer:
B
— To clean up environmental pollutants
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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 boron in industry? (2019) 2019
A.
Fertilizers
B.
Glass production
C.
Metallurgy
D.
Pharmaceuticals
Show solution
Solution
Boron is primarily used in the production of glass and ceramics.
Correct Answer:
B
— Glass production
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Q. What is the primary use of boron in the industry? (2023)
A.
Fertilizers
B.
Glass production
C.
Detergents
D.
Pharmaceuticals
Show solution
Solution
Boron is primarily used in the production of glass and ceramics.
Correct Answer:
B
— Glass production
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Q. What is the primary use of calcium carbonate? (2019)
A.
As a fertilizer
B.
In the production of glass
C.
As a building material
D.
In antacids
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Solution
Calcium carbonate is commonly used in antacids to neutralize stomach acid.
Correct Answer:
D
— In antacids
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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
Show solution
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
Show solution
Solution
Citric acid is commonly used as a flavor enhancer in food products.
Correct Answer:
B
— Flavor enhancer
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