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1. |
Dirty cloths containing grease and oil?stains are cleaned by adding detergents to water. Stains are removed because detergent:1). Reduced drastically the surface tension between water and oil2). increases the surface tension between water and oil3). increase the viscosity of water and oil4). d ecreases the visocity in detergent mixed water |
Answer» OPTION 1 : SEEMS CORRECT | |