IV. ANSWER THE FOLLOWING:
22. What are the secondary sexual characters in male and female?
23. Explain about the steps involved in the purification of water in treatment
plant.
24. (a) Manufacturing of synthetic fibres is actually helping conservation of forest
comment. (3 marks)
(b) Why is the person catch in fire is covered with a blanket? (2 marks)
25. Write the following chemical properties of metals:
i. Action of Acids
ii. Action of Bases
iii. Displacement reactions
26. Draw and explain a well labelled figure of human ear.
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2. What are the secondary sexual characters in male and female?
23. Explain about the steps involved in the purification of water in treatment
plant.
24. (a) Manufacturing of synthetic fibres is actually helping conservation of forest
comment. (3 marks)
(b) Why is the person catch in fire is covered with a blanket? (2 marks)
25. Write the following chemical properties of metals:
i. Action of Acids
ii. Action of Bases
iii. Displacement reactions
26. Draw and explain a well-labeled figure of the human ear.
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