Which of the following statements explain why hot soapy water is more effective in cleaning...

PHYSICSWAEC 2020

Which of the following statements explain why hot soapy water is more effective in cleaning oil-stained dishes?

  • A. The oil on the dishes repels the soap
  • B. soap and heat decrease the surface tension of oil
  • C. soap increases the surface tension of oil and water
  • D. Hot water increases the surface tension of oil

Correct Answer: B. soap and heat decrease the surface tension of oil

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