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What is the colour of copper sulphate ?...

What is the colour of copper sulphate ?

A

Colourless

B

Blue

C

Black

D

Red

Text Solution

Verified by Experts

The correct Answer is:
B
Copper sulphate solution is Blue in colour. However, the solid may be white or blue. The white form of copper sulphate powder is the dehydrated form, which contains no water. The hydrated form of copper sulphate powder is blue in colour.
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(i) Crystals of copper sulphate are heated in a test tube for some time. (a) What is the colour of copper sulphate crystals before heating, and after heating? (b) What is the source of liquid droplets seen on the inner upper side of the test tube during the heating process? (ii) A metal 'X' when dipped in aqueous solution of aluminium sulphate no reaction is observed whereas when it is dipped in an aqueous solution of ferrous sulphate, the pale green solution turns colourless. Identify metal 'X' with reason.

Why does the colour of copper sulphate solution change when an iron nail is dipped in it?

Knowledge Check

  • When an iron nail is dipped in copper sulphate solution. The colour of copper sulphate solution fades and brownish layer is deposited over the iron nail. This is an example of

    A
    decomposition reaction
    B
    double displacement reaction
    C
    displacement and redox reaction
    D
    combination reaction

  • When an iron nail is dipped in copper sulphate solution. The colour of copper sulphate solution fades and brownish layer is deposited over the iron nail. This is an example of

    A
    decomposition reaction
    B
    double displacement reaction
    C
    displacement and redox reaction
    D
    combination reaction

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    Why does the colour of copper sulphate solution change when an iron nail is dipped in it ?

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    What changes do you observe in the iron nails and colour of copper sulphate solution if the nails are dipped in CuSO_(4) solution for 15 minutes ?

    You are given the following materials: (i) Iron nails (ii) Copper sulphate solution (iii) Barium chloride solution (iv) Copper powder (v) Ferrous sulphate crystals (vi) Quick lime Identify the type of chemical reaction taking place when : Iron nails when left dipped in blue copper sulphate solution become brownish in colour and the blue colour of copper sulphate fades away.

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