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Deep Blue (1989)

Duration: 2:22

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Deep blue \( \mathrm{CuSO}_{4} \cdot 5 \mathrm{H}_{2} \mathrm{O} \) is converted to a bluish white salt at \( 100^{\circ} \mathrm{C} \). At \( 250^{\circ} \mathrm{C} \) and \( 750^{\circ} \mathrm{C} \) it is then transformed to a white powder \( (X) \) and black material \( (Y) \) respectively. Identify the salts.
(A) \( X=\mathrm{Cu}, Y=\mathrm{CuSO}_{4} \)
(B) \( X=\mathrm{Cu}_{2} \mathrm{~S}, Y=\mathrm{CuO} \)
(C) \( X=\mathrm{CuSO}_{4} \cdot \mathrm{H}_{2} \mathrm{O}, Y=\mathrm{CuO}_{2} \)
(D) \( X=\mathrm{CuSO}_{4}, Y=\mathrm{CuO} \)
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