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Water with detergent dissolved in it should have small angles of contact. |
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Answer» Solution :The clothes have narrow PORES or spaceswhich act as capillaries . The HEIGHT of liquid in capillary, `h=(2Tcostheta)/(rrhog)` `therefore` Height h is proportinal to `costheta` (Where `theta` is ANGLE of CONTACT). As the `theta` is smaller for DETERGENT , therefore `costheta` will be large . Due to this the detergent will penetrate more in the narrow pores of the clothes. |
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