Q54 / 180 · KCET 2009 · Chemistry

The function of $\mathrm{Fe}(\mathrm{OH})_{3}$ in the contact process is

  • Correct answer
    A
    to remove arsenic impurity
  • B
    to detect colloidal impurity
  • C
    to remove moisture
  • D
    to remove dust particles

Solution

The function of $\mathrm{Fe}(\mathrm{OH})_{3}$ in the contact process is to remove arsenic impurity. $\mathrm{Fe}(\mathrm{OH})_{3}$ is a positive sol, hence it removes arsenic impurity which is a negative sol.

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

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