Inorganic Chemistry - p-Block Elements (Class 12)

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Q1. What is the primary oxidation state of nitrogen in nitric acid (HNO3)? (2023)

Solution:

In nitric acid, nitrogen has an oxidation state of +5.

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Q2. Which of the following compounds is an example of a covalent compound? (2019)

Solution:

SiO2 (silicon dioxide) is a covalent compound formed by the sharing of electrons between silicon and oxygen.

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Q3. Which of the following compounds contains a coordinate bond? (2023)

Solution:

Carbon monoxide (CO) contains a coordinate bond between carbon and oxygen.

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Q4. Which of the following is the most electronegative element? (2023)

Solution:

Fluorine is the most electronegative element in the periodic table.

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Q5. Which of the following elements does not form a stable +4 oxidation state? (2023)

Solution:

Lead does not form a stable +4 oxidation state; it is more stable in the +2 state.

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Q6. What is the primary product when aluminum reacts with hydrochloric acid? (2020)

Solution:

When aluminum reacts with hydrochloric acid, hydrogen gas (H2) is produced along with aluminum chloride (AlCl3).

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Q7. Which of the following compounds is used as a dry cleaning solvent? (2022)

Solution:

Carbon tetrachloride is commonly used as a dry cleaning solvent.

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Q8. What is the main product when aluminum reacts with hydrochloric acid? (2023)

Solution:

When aluminum reacts with hydrochloric acid, hydrogen gas (H2) is produced along with aluminum chloride (AlCl3).

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Q9. What is the main product of the thermal decomposition of ammonium dichromate? (2023)

Solution:

The thermal decomposition of ammonium dichromate produces chromium(III) oxide (Cr2O3) as the main product.

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Q10. Which of the following is the most acidic oxide? (2022)

Solution:

P2O5 (phosphorus pentoxide) is the most acidic oxide among the given options.