Question

Crystals of a substance changed their color on heating in a closed test tube but regained it after some time when they were cooled down. Name the substance and write it’s formula and explain the phenomenon involved.

Answer 1

Answer:

Give equations of related reactions. Give two uses of the compound. Answer : a) Crystals of a substance which changed their colour on heating in a closed test tube but regained it after sometime when they were allowed to cool down are copper sulphate or more specifically hydrated copper sulphate.

Answer 2

Answer:

formula is CuSO4

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