Crystals of a substance changed their colour on heating in a closed vessel but regained after sometime, when they were allowed to cool down.
Crystals of a substance changed their colour on heating in a closed vessel but regained after sometime, when they were allowed to cool down.
(i) Name one such substance.
(ii) Explain the phenomenon involved.
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(i) CuSO4.SH2O
CuSO4.5H2O Heat →CuSO4+5H2O
CuSO4.5H2O-(Blue)
CuSO4+5H2O-(White)
(ii) Explanation: On heating, crystal loses water of crystallisation and regain it on cooling
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