When a blue-colored salt X is heated vigorously over a burner, water is removed and a white powder Y is left behind. When a few drops of water are added to powder Y, it turns blue again. Identify X and Y.

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Solution

Option B is correct:
X: ${CuSO}_{4} .5 H_{2} O$
Y: ${CuSO}_{4}$

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When a blue-colored salt X is heated vigorously over a burner, water is removed and a white powder Y is left behind. When a few drops of water are added to powder Y, it turns blue again. Identify X and Y.

Option B is correct: X: CuSO4.5H2O Y: CuSO4

Option B is correct:
X: ${CuSO}_{4} .5 H_{2} O$
Y: ${CuSO}_{4}$