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      Question

      Which gas is commonly used to fill

      balloons?
      A Argon Correct Answer Incorrect Answer
      B Helium Correct Answer Incorrect Answer
      C Krypton Correct Answer Incorrect Answer
      D Radon Correct Answer Incorrect Answer

      Solution

      Helium is a colorless, odorless, non-toxic, and inert gas that is lighter than air, making it ideal for filling balloons. It is preferred over hydrogen because it is non-flammable.

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