A piece of granulated zinc was dropped into copper sulphate solution. After some time, the colour of the solution changed from :

light green to blue

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blue to colourless

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light green to colourless

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blue to yellow

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Solution

The correct option is B blue to colourless
When a piece of granulated zinc was dropped into copper sulphate solution, the colour of the solution changes from blue to colourless as the following reaction takes place:
$Z n + C u S O_{4} \to Z n S O_{4} + C u$
blue colourless

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Similar questions

Q. A piece of granulated zinc was dropped into copper sulphate solution. After some time, the colour of the solution changed from :
(1) light green to blue
(2) blue to colourless
(3) light green to colourless
(4) bule to yellow

Q. An iron nail was dropped into copper sulphate solution. After some time, the colour of the solution changed from :
(1) light green to blue
(2) blue to light green
(3) light green to colourless
(4) blue to yellow

Q. Four students A, B, C and D noted the initial colour of the solutions in beakers I, II, III and IV. After inserting zinc rods in each solution and leaving it undisturbed for two hours, noted the colour of each solution again.

They recorded their observations in the form of a table given below:

Student	Colour of the solution	I	II	III	IV
A	Initial Final	Colourless Colourless	Colourless Colourless	Light green Colourless	Blue Colourless
B	Initial Final	Colourless Colourless	Light yellow Colourless	Light green Light green	Blue Colourless
C	Initial Final	Colourless Light blue	Colourless Colourless	Light green Colourless	Blue Light blue
D	Initial Final	Light green Colourless	Colourless Colourless	Light green Dark green	Blue Colourless

Which student noted the colour change in all the four beakers correctly?

When few pieces of iron are dropped into a blue coloured copper sulphate solution, the blue colour fades and eventually turns into light green due to the formation of:

When a few pieces of iron are dropped into a blue solution of copper sulphate, its blue colour slowly changes into light green and also a red substance is formed. The blue solution is due to the formation of

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A piece of granulated zinc was dropped into copper sulphate solution. After some time, the colour of the solution changed from :

The correct option is B blue to colourlessWhen a piece of granulated zinc was dropped into copper sulphate solution, the colour of the solution changes from blue to colourless as the following reaction takes place:Zn+CuSO4→ZnSO4+Cu blue colourless

The correct option is B blue to colourless
When a piece of granulated zinc was dropped into copper sulphate solution, the colour of the solution changes from blue to colourless as the following reaction takes place:
$Z n + C u S O_{4} \to Z n S O_{4} + C u$
blue colourless