Question

The colours of aqueous solutions of CuSO4 and FeSO4 as observed in the laboratory are:(A) pale green and light blue respectively(B) light blue and dark green respectively(C) dark blue and dark green respectively(D) dark blue and pale green respectively

Answer 1

I think B option is correct.
Colour of the solution depend on degree of hydration.

Answer 2

(B) light blue and dark green respectively

Explanation:

CuSO4 is blue in its aqueous form. The anhydrous crystals of CuSO4 are white n color but when water drops are added to it then its blue color intensifies due to conversion into hydrated copper sulfate.

The aqueous form of FeSO4 is dark green in color when its solution is heated and the whole water vaporizes then on further heating the crystals convert into brown color. When we add some water droplets to this it again converts into  greenish color.

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TOPIC: anhydrous and hydrated Copper Sulfate and Ferrous Sulfate

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