Copper sulphate solution isin colour. If iron filings are added to it, the colour changes to.

orange

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blue

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red

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green

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black

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Solution

The correct options are
B blue
D green
Copper sulphate solution is usually blue in colour. When iron filings are added to it, iron replaces copper from its salt solution to form ferrous sulphate which is green in colour. This displacement happens because iron is more reactive than copper.

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Similar questions

When iron fillings are added to a blue coloured copper sulphate solution, what colour change would you observe in solution?

Student	Aluminium sulphate solution (I)	Copper sulphate solution (II)
A	Colourless changes to light green	Blue colour of the solution is retained
B	Colour of colourless solution does not change	Blue colour of the solution changes to light green
C	Colourless solution changes to light blue	Blue colour of the solution changes to colourless
D	Colour of colourless solution remains unchanged	Blue colour of the solution fades away

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