Upon heating with C u 2 S , the reagent(s) that give copper metal is/are

Upon heating with Cu2S , the reagent(s) that give copper metal is/are
  1. CuFeS2
  2. CuO
  3. Cu2O
  4. CuSO4

Solution

A] 2CuFeS2+O2Cu2S+2FeS+SO2
B] 4CuO1100oC2Cu2O+O2
2Cu2O+Cu2S6Cu+SO2
C] Cu2S+2Cu2O6Cu+SO2
D] CuSO4720oCCuO+SO2+12O2
4CuO1100oC2Cu2O+O2
2Cu2O+Cu2S6Cu+SO2

Asked in: JEE Advanced 2014 (Paper 1)

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