Question

Which of the following used to make dry ice? A. Hydrogen B. Oxygen C. Nitrogen D. Carbon dioxide

Answer 1

Answer:

D. CARBON DIOXIDE

Explanation:

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Answer 2

Answer:

Dry ice is a solid form of carbon dioxide. It is used primarily as a cooling agent but is also used in fog machines at theatres for dramatic effects. Its advantages include lower temperature than that of water ice and not leaving any residue (other than incidental frost from moisture in the atmosphere). It is useful for preserving frozen foods where mechanical cooling is unavailable.

Dry ice sublimates at 194.7 K (−78.5 °C; −109.2 °F) at Earth atmospheric pressure. This extreme cold makes the solid dangerous to handle without protection from frostbite injury. While generally not very toxic, the outgassing from it can cause hypercapnia (abnormally elevated carbon dioxide levels in the blood) due to buildup in confined locations.

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