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Question

C+2CuOX+Y
The compound X and Y are:

A
CO2,Cu
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B
CO,Cu2O
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C
both A and B
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D
None of the above
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Solution

The correct option is A CO2,Cu
C and H are oxidized to CO2 and H2O when heated with CuO.
CO2 turns lime water milky and H2O turns anhydrous CuSO4 to hydrated CuSO4 which is blue in carbon.

Detection of C:
C+2CuOΔCO2+2Cu

CO2+Ca(OH)2ΔCaCO3+H2O

Detection of H:
2H+CuOΔH2O+Cu
CuSO4+5H2OΔCuSO4.5H2O

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