, , , and and will get +1 marks; choosing ONLY Roasting of Malachite produces Cuprite.

, and and will get +2 marks; choosing ONLY and will get +1 marks; choosing ONLY Calcination of Calamine produces Zincite.

and Copper pyrites is heated with silica in a reverberatory furnace to remove iron.

. ONE OR MORE THAN ONE of these four option(s) is(are) correct answer(s). • For each question, choose the option(s) corresponding to (all) the correct answer(s). • Answer to each question will be evaluated according to the following marking scheme: Full Marks : +4 ONLY if (all) the correct option(s) is(are) chosen; Partial Marks : +3 If all the four options are correct but ONLY three options are chosen; Partial Marks : +2 If three or more options are correct but ONLY two options are chosen, both of which are correct; Partial Marks : +1 If two or more options are correct but ONLY one option is chosen and it is a correct option; Zero Marks : 0 If none of the options is chosen (i.e. the question is unanswered); Negative Marks : -2 In all other cases. • For example, in a question, if are the ONLY three options corresponding to correct answers, then choosing ONLY will get +4 marks; choosing ONLY will get +2 marks; choosing ONLY will get +2 marks; choosing ONLY will get +1 marks; choosing no option (i.e. the question is unanswered) will get 0 marks; and choosing any other combination of options will get -2 marks. The correct statement(s) related to processes involved in the extraction of metals is(are) Impure silver is treated with aqueous KCN in the presence of oxygen followed by reduction with zinc metal.