It seems like the answer options are missing from your query. One step that is not typically used in the extraction of metals is "crushing and grinding an already finely-powdered ore"; while sometimes ores need to be crushed initially, if they are already in a fine powder, further crushing wouldn't be necessary.
All steps are used for the extraction of metals except
Review the verified answer and explanation for this ETEA Educational Testing and Evaluation Agency past-paper question on CampusFin.
Question context
This question is part of 📚 General Knowledge within the broader 🌐 Current Affairs & GK subject and appears in the ETEA Educational Testing and Evaluation Agency preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.