Q13 / 180 · KCET 2021 · Chemistry

Permanent hardness cannot be removed by

  • A
    using washing soda
  • B
    Calgon's method
  • Correct answer
    C
    Clark's method
  • D
    ion exchange method

Solution

Permanent hardness cannot be removed by Clark's method. This method is used for removing temporary hardness.

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

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