Q. Which of the following ions is commonly used in a salt bridge? (2020)
-
A.
Na+
-
B.
Cl-
-
C.
K+
-
D.
Ca2+
Solution
Potassium ions (K+) are commonly used in salt bridges to maintain electrical neutrality.
Correct Answer: C — K+
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Q. Which of the following ions is responsible for the color of the solution in transition metal complexes? (2022)
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A.
Anions
-
B.
Cations
-
C.
Neutral molecules
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D.
All of the above
Solution
Cations of transition metals are primarily responsible for the color of their complexes.
Correct Answer: B — Cations
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Q. Which of the following is a characteristic of a reversible cell? (2019)
-
A.
It can be recharged
-
B.
It cannot be recharged
-
C.
It has a fixed voltage
-
D.
It operates at constant temperature
Solution
A reversible cell can be recharged, allowing it to be used multiple times.
Correct Answer: A — It can be recharged
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Q. Which of the following is a characteristic of addition polymers? (2019)
-
A.
Formed by condensation
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B.
Involves the elimination of small molecules
-
C.
Monomers have double bonds
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D.
Decomposes easily
Solution
Addition polymers are formed from monomers that contain double bonds, which open up to form long chains.
Correct Answer: C — Monomers have double bonds
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Q. Which of the following is a characteristic of aromatic hydrocarbons? (2023)
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A.
They are saturated
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B.
They have a pleasant smell
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C.
They are highly reactive
-
D.
They contain double bonds only
Solution
Aromatic hydrocarbons are known for their pleasant smell and contain a stable ring structure.
Correct Answer: B — They have a pleasant smell
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Q. Which of the following is a characteristic of cross-linked polymers? (2023)
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A.
Flexible
-
B.
Linear structure
-
C.
High melting point
-
D.
Low tensile strength
Solution
Cross-linked polymers have a three-dimensional network structure, which gives them a high melting point and strength.
Correct Answer: C — High melting point
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Q. Which of the following is a characteristic of essential amino acids? (2019)
-
A.
Can be synthesized by the body
-
B.
Must be obtained from diet
-
C.
Are not required for protein synthesis
-
D.
Are only found in animal products
Solution
Essential amino acids cannot be synthesized by the body and must be obtained through the diet.
Correct Answer: B — Must be obtained from diet
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Q. Which of the following is a characteristic of essential oils? (2019)
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A.
Water-soluble
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B.
Volatile
-
C.
Non-toxic
-
D.
All of the above
Solution
Essential oils are volatile compounds that are often used for their aromatic properties and therapeutic benefits.
Correct Answer: B — Volatile
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Q. Which of the following is a characteristic of ethers? (2019)
-
A.
Higher boiling point than alcohols
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B.
Lower boiling point than alcohols
-
C.
Soluble in water
-
D.
Flammable
Solution
Ethers generally have lower boiling points than alcohols due to the absence of hydrogen bonding.
Correct Answer: B — Lower boiling point than alcohols
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Q. Which of the following is a characteristic of ionic solids? (2020)
-
A.
High electrical conductivity in solid state
-
B.
High melting point
-
C.
Low density
-
D.
Malleable
Solution
Ionic solids are characterized by high melting points due to the strong electrostatic forces between the ions.
Correct Answer: B — High melting point
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Q. Which of the following is a characteristic of isomers? (2022)
-
A.
Same molecular formula
-
B.
Different molecular formula
-
C.
Same physical properties
-
D.
Same structural formula
Solution
Isomers have the same molecular formula but different structural or spatial arrangements.
Correct Answer: A — Same molecular formula
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Q. Which of the following is a characteristic of multilayer adsorption? (2019)
-
A.
Occurs at low pressures only
-
B.
Described by the Langmuir isotherm
-
C.
Described by the BET theory
-
D.
Involves only physical adsorption
Solution
Multilayer adsorption is described by the BET theory, which accounts for the formation of multiple layers of adsorbate on the adsorbent.
Correct Answer: C — Described by the BET theory
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Q. Which of the following is a characteristic of organic compounds? (2021)
-
A.
They contain carbon
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B.
They are always solid
-
C.
They are ionic
-
D.
They do not burn
Solution
Organic compounds are primarily characterized by the presence of carbon atoms in their structure.
Correct Answer: A — They contain carbon
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Q. Which of the following is a characteristic property of ethers? (2019)
-
A.
High boiling point
-
B.
Solubility in water
-
C.
Low reactivity
-
D.
Acidic nature
Solution
Ethers are generally low in reactivity compared to alcohols and phenols, making them stable compounds.
Correct Answer: C — Low reactivity
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Q. Which of the following is a characteristic property of group 13 elements? (2019)
-
A.
Forming covalent compounds
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B.
High melting points
-
C.
Good conductors of electricity
-
D.
Forming ionic compounds
Solution
Group 13 elements typically form covalent compounds due to their tendency to share electrons.
Correct Answer: A — Forming covalent compounds
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Q. Which of the following is a characteristic property of halogens? (2020)
-
A.
Good conductors of electricity
-
B.
High melting points
-
C.
Diatomic molecules
-
D.
Metallic luster
Solution
Halogens exist as diatomic molecules (e.g., Cl2, F2) in their elemental form.
Correct Answer: C — Diatomic molecules
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Q. Which of the following is a characteristic property of noble gases? (2019)
-
A.
High reactivity
-
B.
Colorless and odorless
-
C.
Forming ionic bonds
-
D.
High boiling points
Solution
Noble gases are colorless and odorless under standard conditions.
Correct Answer: B — Colorless and odorless
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Q. Which of the following is a common allotrope of phosphorus? (2022)
-
A.
Red phosphorus
-
B.
Black phosphorus
-
C.
White phosphorus
-
D.
All of the above
Solution
Phosphorus exists in several allotropes, including red, black, and white phosphorus.
Correct Answer: D — All of the above
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Q. Which of the following is a common analgesic? (2021)
-
A.
Ibuprofen
-
B.
Aspirin
-
C.
Paracetamol
-
D.
All of the above
Solution
All of the options listed (Ibuprofen, Aspirin, and Paracetamol) are common analgesics used to relieve pain.
Correct Answer: D — All of the above
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Q. Which of the following is a common artificial flavoring agent? (2023)
-
A.
Vanillin
-
B.
Caffeine
-
C.
Citric acid
-
D.
Tartaric acid
Solution
Vanillin is a common artificial flavoring agent that mimics the flavor of vanilla.
Correct Answer: A — Vanillin
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Q. Which of the following is a common emulsifier used in food products? (2022)
-
A.
Lecithin
-
B.
Sorbitol
-
C.
Glycerol
-
D.
Glucose
Solution
Lecithin is a common emulsifier that helps to mix oil and water in food products.
Correct Answer: A — Lecithin
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Q. Which of the following is a common ingredient in anti-aging creams? (2021)
-
A.
Retinol
-
B.
Glycolic acid
-
C.
Salicylic acid
-
D.
Both Retinol and Glycolic acid
Solution
Both Retinol and Glycolic acid are commonly used in anti-aging creams for their skin rejuvenating properties.
Correct Answer: D — Both Retinol and Glycolic acid
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Q. Which of the following is a common ingredient in anti-inflammatory drugs? (2022)
-
A.
Ibuprofen
-
B.
Acetaminophen
-
C.
Aspirin
-
D.
All of the above
Solution
Ibuprofen, Acetaminophen, and Aspirin are all common ingredients in anti-inflammatory medications.
Correct Answer: D — All of the above
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Q. Which of the following is a common method to measure surface area of adsorbents? (2019)
-
A.
TGA
-
B.
BET method
-
C.
DSC
-
D.
XRD
Solution
The BET method (Brunauer-Emmett-Teller) is commonly used to measure the surface area of adsorbents.
Correct Answer: B — BET method
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Q. Which of the following is a common oxidation state of gold? (2023)
Solution
Gold commonly exhibits oxidation states of +1 and +3, with +3 being the most stable.
Correct Answer: C — +3
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Q. Which of the following is a common oxidation state of iron? (2023)
Solution
Iron commonly exhibits oxidation states of +2 and +3, with +3 being more prevalent in compounds.
Correct Answer: C — +3
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Q. Which of the following is a common oxidation state of manganese? (2022)
Solution
Manganese commonly exhibits an oxidation state of +2.
Correct Answer: B — +2
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Q. Which of the following is a common preservative in food? (2019)
-
A.
Sodium benzoate
-
B.
Ethanol
-
C.
Acetic acid
-
D.
Benzene
Solution
Sodium benzoate is widely used as a food preservative to prevent spoilage.
Correct Answer: A — Sodium benzoate
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Q. Which of the following is a common property of halogens? (2023)
-
A.
They are all gases at room temperature
-
B.
They have low electronegativity
-
C.
They form diatomic molecules
-
D.
They are metals
Solution
Halogens commonly exist as diatomic molecules (e.g., Cl2, F2).
Correct Answer: C — They form diatomic molecules
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Q. Which of the following is a common side effect of antibiotics? (2019)
-
A.
Nausea
-
B.
Headache
-
C.
Diarrhea
-
D.
All of the above
Solution
Antibiotics can cause a range of side effects, including nausea, headache, and diarrhea.
Correct Answer: D — All of the above
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