The function of \( Fe(OH)_{3} \) in the contact process is
Show Hint
- to remove arsenic impurity
- to detect colloidal impurity
- to remove moisture
- to remove dust particles
The Correct Option is A
Solution and Explanation
In the contact process for manufacturing sulphuric acid, arsenic impurities can poison the catalyst.
Step 2: Mechanism
Arsenic impurity typically exists as a negative sol ($As_2O_3$).
Step 3: Purification
$Fe(OH)_{3}$ is a positive sol. It is used to neutralize and remove the negatively charged arsenic sol from the gas stream.
Final Answer: (a)
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