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A metallic piece (X) is dropped into cop...

A metallic piece (X) is dropped into copper sulphate solution. After some time, the blue colour of the solution changes to green.

Metal X and the change which has occurred are respectively

A

Aluminium and physical, reversible change

B

Magnesium and physical, irreversible change

C

Iron and chemical, reversible change

D

Iron and chemical, irreversible change.

Text Solution

Verified by Experts

The correct Answer is:
D
When iron is dropped into copper sulphate solution, the blue colour of copper sulphate changes to green due to formation of a new substance (iron sulphate).
`"Iron" + underset("Blue)"("Copper sulphate") rarr underset("(Green)")("Iron sulphate") + Copper`
As new substances are formed, the change is chemical and irreversible.
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