2025 First-Term Mid-Term Test on Chemistry JSS2

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Welcome to your 2025 First-Term Mid-Term Test on Chemistry JSS2

Which of the following is a physical change?

2. Which of the following best describes a chemical change?

3. Which of the following is the chemical name for rust?

4. Which of the following statements about rusting is correct?

5. Which of the following is a method of preventing rusting?

6. Which of the following is an example of a chemical change involving chemicals?

7. Which of the following is NOT a characteristic of a physical change?

8. The chemical formula for rust is

9. A chemical can be best defined as

10. Which of the following observations show a chemical reaction has occured?

Section B Answer all the 5 questions

1. A chemical change affects only the colour, odour, size, density, and shape of matter. True or False

2. Demagnetisation and magnetisation of iron rods is an example of a chemical change. True or False

3. Iron will likely rust faster in an environment near ocean or sea than on mainland because of the presence of —

4. Coating an iron with zinc is called —

5. A/an — is formed when a metal is mixed with one or more elements to create a new, stronger, harder, and more resistant material.

THEORY Answer any 2 questions

1a. State 2 causes and 2 preventive measures of Rusting 1b. Write the chemical equation for rusting showing the reactants and products.

2a. Define chemicals 2b. Give one example of chemicals based on each of the following: –origin –composition –use/function –physical state

3a. What are harmful chemicals? 3b. State 4 safety measures for chemicals

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