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  3. 10th Class
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10th Class Science Sample Paper Science Olympiad Model Test Paper-3

  • question_answer
    Which one of the following is correct about the uses of hydrochloric acid?

    A) Toilet cleaner     

    B) Pickling of metals

    C) Digestion of food

    D) All of these

    E) None of these              

    Correct Answer: D

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