Question

What happens when blue vitrol is heated is gives black residue or white?

Answer 1

Answer:

blue vitriol is blue in colour. when blue vitriol is heated it becomes white because it's water of crystallization separates from it. the water molecules attached to a compound as water crystallization gives shape and colour to the crystals..

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Answer 2

Answer:

white coloured substance

Explanation:

When blue vitriol is heated it loses it crystallization form and loses it colour and water molecule present in it .