2022Q4(i)(a)Metallurgy

Short answerEasy1 mark

4(i)

State the relevant reason for the following:

Concentrated alkali is used for the concentration of bauxite ore.

Topic: Metallurgy, ores, extraction and alloys

Previous-year question practice database

Answer

Exam answer

Concentrated NaOH dissolves amphoteric alumina as soluble sodium aluminate, leaving many impurities behind.

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