Presence of water can be detected by

1.	Presence of water can be detected by
Answer» ADDING a drop to anhydrous copper sulphate which changes its colour from white to blue by boiling and testing for the presence of `H_(2)` and `O_(2)` by seeing its colour and transparency by CHECKING the production of lather when mixed with soap. Solution :Anhydrous `CuSO_(4)` is white which on REACTION with `H_(2)O` forms hydrated `CuSO_(4)` which is blue in colour. `underset("(anhydrous, white)")(CuSO_(4))+5H_(2)O to underset("(hydrated, blue)")(CuSO_(4).5H_(2)O)`

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