A) to remove arsenic impurity
B) to detect colloidal impurity
C) to remove moisture
D) to remove dust particles
Correct Answer: A
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.You need to login to perform this action.
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