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Question

Distinguish between the following: (i) Pure substances and Mixture

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Answer

S.No Pure substances Mixture
1. These are made up of only one kind of particles These are made up of two or more elements or compounds
2. For example, silver, copper, etc. For example, sea water, smoke, etc.

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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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