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

  • question_answer
    Look at the following reaction and choose the correct statement. \[Ca{{(OH)}_{2}}+C{{O}_{2}}\to CaC{{O}_{3}}+{{H}_{2}}O\]

    A) \[C{{O}_{2}}\]Turns lime water milky.

    B) White coloured insoluble calcium carbonate is formed.

    C) It is a physical change.

    D) Both [a] and [b]

    E) None of these

    Correct Answer: D


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