Dry ice is used in fire extinguishers. The dry ice is stored in the cylinder in a solid form. When sprayed on a fire it quickly changes into the gas known as carbon dioxide $({C O}_{2})$ . What is this change of state called?

Sublimation

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Condensation

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Distillation

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Evaporation

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Solution

The correct option is A Sublimation
Sublimation is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase.

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Dry ice is the solid form of carbon dioxide and is used as a refrigerant.

C O_{2}

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