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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