Metals and non-metals-class 10th science test

Here is a comprehensive test paper for Class 10 Science, Chapter 3: Metals and Non-metals, designed to assess in-depth knowledge, competency, and familiarity with previous exam patterns, aligned with the latest CBSE syllabus for 2024-25.

Section A: In-Depth Knowledge Questions

1. Explain the extraction process of aluminium from its ore. Include the chemical reactions involved and discuss the significance of each step in the extraction process.
2. Discuss the amphoteric nature of aluminium oxide and zinc oxide. Provide balanced chemical equations to illustrate their reactions with both acids and bases.
3. Compare and contrast the chemical properties of metals and non-metals. Provide examples to support your explanation, focusing on their reactions with oxygen, water, acids, and bases.

Section B: Competency-Based Questions

4. A student observes that a metal ‘X’ reacts vigorously with cold water, producing a colorless gas that burns with a pop sound. Identify metal ‘X’ and write the balanced chemical equation for the reaction. Explain the observations.
5. An unknown element ‘Y’ is brittle, does not conduct electricity, and has a dull appearance. Based on these properties, classify ‘Y’ as a metal or non-metal. Justify your classification with appropriate reasoning.
6. Design an experiment to demonstrate the displacement reaction between copper sulfate solution and iron. List the materials required, procedure, observations, and the chemical equation for the reaction.

Section C: Previous Year Questions

7. A metal ‘M’ does not react with cold water but reacts with steam to form an oxide ‘MO’ and hydrogen gas. Identify the metal ‘M’ and write the balanced chemical equation for the reaction.
8. Explain why sodium and potassium are stored under kerosene. Discuss the properties of these metals that necessitate this storage method.
9. What happens when calcium is treated with water? Write the balanced chemical equation for the reaction and describe the observations.

Section D: NCERT Textbook Questions

10. Why do ionic compounds have high melting and boiling points? Explain the nature of bonding in these compounds that leads to such properties.
11. Define the term ‘alloy’ and explain why alloys are used in place of pure metals. Provide two examples of alloys and their applications.

Section E: Sample Paper Questions

12. Explain the process of electrolytic refining of copper. Include a labeled diagram and describe the reactions occurring at the anode and cathode.
13. Differentiate between roasting and calcination. Provide one example of each process with the relevant chemical equations.
14. A non-metal ‘Z’ is a good conductor of electricity. Identify ‘Z’ and explain its conductivity in terms of its structure.

Section F: Case-Based Questions

15. Case Study: Corrosion of Iron

Iron articles are often coated with zinc to prevent rusting.

1. What is this process called?
2. Explain how this process prevents corrosion.
3. Write the chemical equations for the formation of rust.
4. Case Study: Reactivity Series Application

A strip of metal ‘A’ is placed in a solution of metal sulfate ‘BSO₄’. After some time, it is observed that metal ‘B’ is deposited, and the solution becomes a solution of ‘ASO₄’.

1. What can be inferred about the reactivity of metals ‘A’ and ‘B’?
2. Write the balanced chemical equation for the reaction.
3. How can this experiment be used to construct the reactivity series?

This test paper is designed to evaluate a range of skills, including conceptual understanding, application, analysis, and synthesis, in line with the latest CBSE guidelines.