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Which of the chemical is/are added for the removal of hydrogen sulfide and neutralization?

Which of the chemical is/are added for the removal of hydrogen sulfide and neutralization? Correct Answer Sodium hydroxide and lime

Sodium hydroxide and lime are/are added for the removal of hydrogen sulfide and neutralization during the refining of petroleum. NaOH and CaO are the chemical formulae of sodium hydroxide and lime respectively.

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