Copper sulphate solution isin colour. If iron filings are added to it, the colour changes to.
A
red
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B
blue
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C
black
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D
orange
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E
green
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Solution
The correct option is E 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.