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Question

Clotting of blood is an example of _____ change.


A

Physical

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B

Chemical

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C

Electrochemical

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D

Magnetic

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Solution

The correct option is B

Chemical


Well, this one is tricky. You might have thought that blood is liquid and when it clots it becomes solid. So it's a physical change.

But there is also the part where some substances present in our blood help stitch the torn skin together involving some complicated chemical changes.

So clotting of blood involved both physical and chemical changes. Now you know!


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