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Study the following steps. Cu(2)S ove...

Study the following steps.
`Cu_(2)S overset("roasted in air")to (X) overset("roasted without airI")to (Y)`
Based on the above steps, identify X and Y.

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The correct Answer is:
c
`Cu_(2)S` on roasting forms copper oxide and sulphur dioxide gas escapes out. Roasting of copper oxide and left over `Cu_(2)S` in the absence of air forms copper metal and `SO_(2)` gas is evolved.
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