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    Question

    Dry ice

    is:
    A Solid CO₂ Correct Answer Incorrect Answer
    B Solid NH₃ Correct Answer Incorrect Answer
    C Solid SO₂ Correct Answer Incorrect Answer
    D Dry CO₂ gas Correct Answer Incorrect Answer

    Solution

    Dry ice is the common name for solid carbon dioxide (CO₂). It gets its name because it does not melt into a liquid when heated; instead, it changes directly into a gas through sublimation.

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