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7th Class Science Physical and Chemical Changes Question Bank Physical and Chemical Changes

  • question_answer
    Blacksmith grinds edges of iron axe against a spinning wheel to sharpen it. Sparks of fire and heat is generated. On the basis of this statement choose the correct answer.

    A) It is a physical change as only shape of axe changes.

    B) It is a chemical change as heat is generated.

    C) It is chemical change as iron turns into new metal.

    D) None of these.

    Correct Answer: A

    Solution :

    It is a physical change as only shape of axe changes.


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