ASSERTION- Solid CO2 is called dry ice. REASON - It is used primarily as a cooling agent.
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Dry ice is the solid form of carbon dioxide. It is used primarily as a cooling agent. ... Dry ice sublimates at 194.65 K (−78.5 °C; −109.3 °F) at Earth atmospheric pressures. This extreme cold makes the solid dangerous to handle without protection due to burns caused by freezing (frostbite).
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both asseration and reason are true and reason is correct explanation of assertion
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