Q26. How can we convert a saturated solution into an unsaturated solution?
Q27. How do we get salt from sea water?
Q28. You must have often noticed that sky becomes clear after the first rain. Explain why?
Q29. Differentiate between homogeneous and heterogeneous mixtures? Give an example of each.
Q30. What should the size of the pores in a sieve depend upon?
Q31. What are colloids? Give few examples of colloids that you see in your daily life.
Q32. What is the importance of threshing to the farmers?
Q33. What is the function of candles in home water filters?