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Question

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 (CO2). What is this change of state called?

A
Sublimation
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B
Condensation
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C
Distillation
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D
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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