Periodic Table and Periodicity - Case Studies
Q. What is the primary oxidation state of iron in iron(III) oxide?
Solution
In iron(III) oxide (Fe2O3), iron has an oxidation state of +3.
Correct Answer: C — +3
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Q. What type of bond is formed between sodium and chlorine in sodium chloride?
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A.
Covalent
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B.
Ionic
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C.
Metallic
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D.
Hydrogen
Solution
Sodium chloride is formed by ionic bonding between sodium ions and chloride ions.
Correct Answer: B — Ionic
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Q. Which metal is known for its ability to resist corrosion and is often used in jewelry?
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A.
Iron
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B.
Copper
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C.
Gold
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D.
Aluminum
Solution
Gold is highly resistant to corrosion and tarnishing, making it ideal for jewelry.
Correct Answer: C — Gold
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