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प्रश्न
Why a detergent powder is mixed with water to wash clothes?
उत्तर
Detergent powder is combined with water for laundering purposes. Due to water's high surface tension, it is unable to infiltrate the minute pores of soiled fabrics. However, when detergent is mixed with water, the surface tension of the water is reduced. Water penetrates the pores and removes the dirt from the fabric.
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