Detergents clean cloths in washing machine because water solution has

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BPSC AE Paper 3 (General Studies) 10 Nov 2022 Official Paper
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  1. low temperature
  2. low surface tension
  3. low weight
  4. low density

Answer (Detailed Solution Below)

Option 2 : low surface tension
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Explanation:-

Detergents are effective at cleaning clothes in washing machines for the following reason:

  • Low temperature: While temperature can influence the effectiveness of detergents, they do not primarily clean by lowering the temperature of water.
  • Low surface tension: Detergents lower the surface tension of water. This allows the water to more effectively penetrate fabrics, emulsify oils, and break up dirt. Reduced surface tension ensures that water spreads and wets surfaces better, which is crucial for the cleaning process.
  • Low weight: The weight of water is unrelated to the cleaning action of detergents.
  • Low density: The density of water remains largely unchanged with detergent and does not impact the cleaning process.

Therefore, the reason detergents clean clothes is that they reduce the water's surface tension, enhancing its ability to interact with and clean the fabrics is low surface tension

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