A mixture of iron filings and rice flour can be separated by magnet.
Important Questions on Separation of Substances
A mixture of wheat grains and rice flakes can be separated by winnowing.
Match the mixtures in Column I with their method of separation in Column II.
| Column I | Column II | ||
| (a) | Oil mixed in water | (i) | Sieving |
| (b) | Iron powder mixed with flour | (ii) | Handpicking |
| (c) | Salt mixed in water | (iii) | Decantation |
| (d) | Lady's finger mixed with French beans | (iv) | Magnet |
| (e) | Rice flour mixed with kidney beans | (v) | Evaporation |
Paheli was feeling thirsty but there was only a pot of water at home which was muddy and unfit for drinking. How do you think Paheli would have made this water fit for drinking if the following materials were available to her?
Alum, tub, muslin cloth, gas stove, thread, pan and lid.
Read the story titled “WISE FARMER” and choose the correct options to complete the story.
A farmer was sad/happy to see his healthy wheat crop ready for harvest. He harvested the crops and left it under the sun/rain to dry the stalks. To separate the seeds from the bundles of the stalk he handpicked/threshed them. After gathering the seed grains he wanted to separate the stones and husk from it. His wife winnowed/threshed them to separate the husk and later sieved/hand-picked to remove stones from it. She ground the wheat grains and sieved/filtered the flour.
The wise farmer and his wife got a good price for the flour. Can you tell why?
