Q. What is the primary oxidation state of manganese in KMnO4?
Solution
In KMnO4, manganese has an oxidation state of +7.
Correct Answer:
D
— +7
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Q. What is the primary product of the reaction between sulfuric acid and sodium hydroxide?
-
A.
Sodium sulfate
-
B.
Water
-
C.
Sodium bisulfate
-
D.
Hydrogen gas
Solution
The reaction between sulfuric acid and sodium hydroxide produces sodium sulfate and water.
Correct Answer:
A
— Sodium sulfate
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Q. Which of the following acids is a strong acid?
-
A.
Acetic acid
-
B.
Hydrochloric acid
-
C.
Citric acid
-
D.
Formic acid
Solution
Hydrochloric acid (HCl) is a strong acid that completely dissociates in water.
Correct Answer:
B
— Hydrochloric acid
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Q. Which of the following metals is most commonly used in the extraction of aluminum?
-
A.
Iron
-
B.
Copper
-
C.
Bauxite
-
D.
Zinc
Solution
Bauxite is the primary ore from which aluminum is extracted through the Bayer process.
Correct Answer:
C
— Bauxite
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Q. Which type of bond is primarily responsible for the high boiling point of water?
-
A.
Ionic bond
-
B.
Covalent bond
-
C.
Hydrogen bond
-
D.
Metallic bond
Solution
Hydrogen bonds between water molecules are responsible for its relatively high boiling point compared to other similar-sized molecules.
Correct Answer:
C
— Hydrogen bond
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