Solid copper(II) sulfate exists in two different forms, anhydrous and hydrated.
One of these forms is blue and the other is white.
The change between these two forms is reversible.
blue form $\rightleftharpoons$ white form
What is the blue form and how is the change from the blue form to the white form brought about?

1 )
A
2 )
B
3 )
C
D
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