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  9. Q53

PPSC PCS 2025 · Question 53 of 100

Consider the following statements regarding soaps: 1. A soap molecule has a hydrophobic head and a hydrophilic tail. 2. Aqueous solution of soap above critical micelle concentration will show the Tyndall effect. Which of the above statements is/are correct?

Science & Tech

  1. A1 only
  2. B2 onlyCorrect
  3. CBoth 1 and 2
  4. DNeither 1 nor 2

Answer: B. 2 only

Explanation

Only statement 2 is correct: a soap molecule has a hydrophilic head and hydrophobic tail, and micellar soap solutions show the Tyndall effect.

Source: https://www.nimbusias.com/wp-content/uploads/2025/12/Punjab-PCS-GS-Original-Paper-2025.pdf

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