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Direction (Q. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d) out of which ONLY ONE option is correct. Blister copper is formed by the following reaction Cu2S+O2(g)→Cu(l)+SO2(g)\text{Cu}_2\text{S} + \text{O}_2(g) \rightarrow \text{Cu}(l) + \text{SO}_2(g) In the reaction a. O2\text{O}_2 oxidises S of Cu2S\text{Cu}_2\text{S} to SO2\text{SO}_2 and Cu+\text{Cu}^+ of Cu2S\text{Cu}_2\text{S} to Cu\text{Cu} b. O2\text{O}_2 oxidises S of Cu2S\text{Cu}_2\text{S} to SO2\text{SO}_2 and reduces Cu+\text{Cu}^+ of Cu2S\text{Cu}_2\text{S} to Cu\text{Cu} c. Cu2S\text{Cu}_2\text{S} first changes to Cu2O\text{Cu}_2\text{O} by O2\text{O}_2 and then Cu2S\text{Cu}_2\text{S} changes to Cu\text{Cu} and SO2\text{SO}_2 d. All the above are correct statements

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