Inorganic Chemistry - p-Block Elements

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Q1. Which of the following is a common allotrope of phosphorus? (2022)

Solution:

Phosphorus exists in several allotropes, including red, black, and white phosphorus.

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Q2. Which of the following is a common property of halogens? (2023)

Solution:

Halogens commonly exist as diatomic molecules (e.g., Cl2, F2).

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Q3. Which of the following compounds is an example of a covalent compound formed by a p-block element? (2022)

Solution:

SiCl4 is a covalent compound formed by silicon, a p-block element.

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Q4. Which of the following is not a property of nitrogen? (2023)

Solution:

Nitrogen is colorless, odorless, and diatomic, but it does not support combustion.

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Q5. Which of the following oxides is amphoteric? (2019)

Solution:

Al2O3 is an amphoteric oxide, reacting with both acids and bases.

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Q6. Which of the following elements is known for forming a stable +3 oxidation state? (2023)

Solution:

Aluminium commonly forms a stable +3 oxidation state in its compounds.

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Q7. What is the primary oxidation state of nitrogen in ammonia (NH3)? (2021)

Solution:

In ammonia, nitrogen has an oxidation state of -3.

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Q8. Which of the following compounds contains a p-block element in its highest oxidation state? (2023)

Solution:

In PCl5, phosphorus is in its highest oxidation state of +5.

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Q9. What is the primary oxidation state of carbon in carbon dioxide (CO2)? (2020)

Solution:

In carbon dioxide, carbon has an oxidation state of +4.

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Q10. What is the common oxidation state of sulfur in sulfuric acid (H2SO4)? (2022)

Solution:

In sulfuric acid, sulfur has an oxidation state of +6.