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

  • question_answer
    DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Lime water turns milky due to presence of calcium bicarbonate. This is a confirmatory test of\[\text{C}{{\text{O}}_{\text{2}}}\]. (ii) Digestion of food and melting of wax are considered as similar type of changes.

    A) Statement (i) is correct while statement (ii) is incorrect.

    B) Statement (ii) is correct while statement (i) is incorrect.

    C) Both statements are correct

    D) Both statements are incorrect.

    Correct Answer: D

    Solution :

    Lime water turns milky due to presence of carbon dioxide. Digestion of food is a chemical change while melting of wax is a physical change.


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