Question

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.​

Answer 1

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.​