Q48 / 150 · MHT CET 2020 (12 Oct Shift 2) · Chemistry

When soap is added to an oily part of cloth, the hydrocarbon part of soap dissolves in

  • A
    Water, keeping the tail away from the oil
  • Correct answer
    B
    Oil, keeping the head away from the oil
  • C
    Water, keeping the head away from the oil
  • D
    Oil, keeping the tail away from the oil

Solution

When soap is added to an oily or greasy part of cloth, the hydrocarbon part of soap dissolves in oil, keeping the head away from the oil. Big molecules of oil and soap break by rubbing into small emulsified oil droplets in water, which are washed away by stream of water.

Hence, the correct answer is option: 'B'.

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