Which of the following ores are calcinared during extraction

Out of the following which ores are calcinated during extraction (a) Copper pyrites (b) Malachite (c) Bauxite Correct answer is

Out of the following which ores are calcinated during extraction (a) Copper pyrites (b) Malachite (c) Bauxite Correct answer is

Which of the following is not added during the extraction of silver by cyanide process?

Which of the following is formed during the extraction of silver ?

Which of the following reactions is/are involved in the extraction of Cy from any ore of copper?

Which of the following ore is not reduced by carbon reduction in the metal extraction process?

Which of the following reaction(s) in blast furnace during extraction of iron?

Which of the following ore is/are extracted from its oxide by sir reduction method