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10th Class Science Sample Paper Science Olympiad Model Test Paper-12

  • question_answer
    When base is heated with an ammonium salt, ammonia gas, another salt and water are produced. Which one of the following helps us to recognize ammonia gas?

    A) Formation of Precipitate of ammonia

    B) Evolution of brown fumes

    C) Evolution of Pungent Smell of ammonia gas

    D) Change of color from red to colourless

    E) None of these

    Correct Answer: C

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