Flash Education

Question

Name the steps and methods you will use to separate the following: (i) Coconut oil, salt and water. (ii) Chalk powder, water and stones (iii) Iron filings, sand and salt.

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Answer

(i) Coconut oil is separated by using a separating funnel and the salt is (ii) Stones being heavy are separated by sedimentation and chalk powder is separated by filtration.

(iii) Iron filings are separated using a magnet and the sand is separated by dissolving in water followed by sedimentation and decantation.

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Read the story titled “WISE FARMER” and tick the correct option to complete the story. A farmer was i. sad/happy to see his healthy wheat crop ready for harvest. He harvested the crops and left it under the ii. Sun/rain to dry the stalks. To separate the seeds from the bundles of the stalk he iii. handpicked/threshed them. After gathering the seed grains, he wanted to separate the stones and husk from it. His wife iv. winnowed/threshed them to separate the husk and later v. sieved/handpicked to remove stones from it. She ground the wheat grains and vi. sieved/filtered the flour. The wise farmer and his wife got a good price for the flour.

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