Inorganic Chemistry - p-Block Elements
Q. What is the primary oxidation state of carbon in carbon dioxide (CO2)? (2020)
Solution
In carbon dioxide, carbon has an oxidation state of +4.
Correct Answer: B — +4
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Q. Which of the following compounds is an example of a covalent compound formed by a p-block element? (2022)
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A.
NaCl
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B.
MgO
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C.
SiCl4
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D.
CaF2
Solution
SiCl4 is a covalent compound formed by silicon, a p-block element.
Correct Answer: C — SiCl4
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Q. Which of the following elements is known for forming a stable +4 oxidation state? (2023)
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A.
Carbon
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B.
Silicon
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C.
Germanium
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D.
Tin
Solution
Tin (Sn) is known for forming a stable +4 oxidation state.
Correct Answer: D — Tin
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Q. Which of the following is a common use of sulfur? (2022)
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A.
Fertilizers
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B.
Explosives
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C.
Rubber production
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D.
All of the above
Solution
Sulfur is used in fertilizers, explosives, and rubber production.
Correct Answer: D — All of the above
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Q. Which of the following is not a property of nitrogen? (2023)
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A.
Colorless gas
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B.
Odorless
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C.
Supports combustion
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D.
Diatomic molecule
Solution
Nitrogen is colorless, odorless, and diatomic, but it does not support combustion.
Correct Answer: C — Supports combustion
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Q. Which of the following oxides is amphoteric? (2019)
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A.
Na2O
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B.
MgO
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C.
Al2O3
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D.
SiO2
Solution
Al2O3 is an amphoteric oxide, reacting with both acids and bases.
Correct Answer: C — Al2O3
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