Short answer type questions
Question 1. What do understand by chemical changes?
Question 2. What do you understand by physical changes?
Question 3. Give some examples of physical changes.
Question 4. Give some examples of chemical changes.
Question 5. What do mean by ozone layer? What does it do?
Question 6. What do understand by galvanization?
Question 7. How stainless steel is made?
Question 8. Why it is important to study chemical changes?
Question 9. Which substances are essential for rusting of iron?
Long answer type question
Question 1. What is rusting?
Question 2. Describe how magnesium hydroxide is prepared. Write the equation of the chemical reactions.
Question 3. Explain the process of galvanisation?
Question 4. Explain the process of crystallisation?
Question 5. Describe how crystals of copper sulphate are prepared?
Question 6. Other than new products what else can accompany a chemical change?