The impurities like As_(2)O_3 result in the poisoning of catalyst. In – InterviewSolution

1.	The impurities like As_(2)O_3 result in the poisoning of catalyst. In contact process, the impurities of arsenic are removed by
Answer» gelantinuous `FE(OH)_(3)` `Al(OH)_(3)` `CR(OH)_(3)` `Fe_(2)O_(3)` ANSWER :A

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