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A stain of curry on a white cloth becomes reddish brown when soap is scrubbed on it because Curry contains turmeric powder and soap is basic in nature. Bases turn turmeric red. Hence, when soap (which is basic in nature) is scrubbed on the stain, the stain turns red. When the cloth is washed with plenty of water, the soap is removed and the yellow colour of the stain reappears.1. Example of a natural indicator?(i) Turmeric(ii) Chilli powder2. Bases turn turmeric _____.(i) Orange(ii) Red3. Is soap basic in nature?(i) YES(ii) NO4. Why did the stain become reddish brown when soap is scrubbed on it?(i) As it was acidic in nature(ii) As it basic in nature5. What happens when the cloth is washed with plenty of water?(i) It turns red again(ii) It turns yellow again |
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Answer» 1. (i) Turmeric 2. (ii) Red 3. (i) YES 4. (ii) As it is basic in nature 5. (ii) It turns yellow again |
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