CBSE Class 7 Answered
vegetables stain or cloths turn red when soap is applied on it
Asked by arajeevshashank | 09 Feb, 2018, 09:36: AM
Expert Answer
Cooked vegetables or vegetable curry contain turmeric powder and soap is basic in nature. Turmeric is a natural indicator which changes its yellow colour into reddish brown when it comes in contact with a solution of base. 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.
Answered by Sheetal Kolte | 09 Feb, 2018, 10:17: AM
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