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KCET2009Chemistryd and f Block Elements

The function of Fe ( OH )₃ in the contact process is

Options

  1. Ato remove arsenic impurity
  2. Bto detect colloidal impurity
  3. Cto remove moisture
  4. Dto remove dust particles

Correct answer

A. to remove arsenic impurity

Step-by-step solution

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

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