Crystals of substance change their colour on heating in a closed vessel but regained it after sometime when they were allowed to cool down the name the substance explain the phenomena involved
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Answer:
The Substance Is Hydrated Salt. Like copper sulphate pentahydrate (CuSO4.5H2O). The hydrated form of this compound is blue in color but the anhydrous form is grey-white.
Explanation:
PHENOMENON :- the crystals of hydrated salts are heated, they lose their water of crystallisation which is responsible for its color. when it is left to cool down, it absorbs moisture from air and again gains its water of crystallisation and thus, also its color.
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