Which of the following substances is known as Dry Ice?
• Dry Ice is the solid form of carbon dioxide (CO₂).
• It is called “dry” because it does not melt into liquid, but directly changes into gas (sublimation).
Information Booster:
• Temperature of dry ice is about −78.5°C.
• It is used for cooling, fog effects, and preservation.
Additional Knowledge:
• Solid Oxygen (Option B) – not called dry ice
• Liquid Hydrogen (Option C) – used as fuel
• Liquid Nitrogen (Option D) – used for cooling but different substance
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