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Question

What happens to dry ice when the pressure under which it is stored is decreased?


Your Answer
A
Solid CO2 converts into liquid CO2
Correct Answer
B
Solid CO2 gets directly converted into gaseous CO2.
Your Answer
C
Liquid CO2 gets directly converted into gaseous CO2.
Your Answer
D
Gaseous CO2 gets directly converted into solidCO2.

Solution

The correct option is B Solid CO2 gets directly converted into gaseous CO2.
Solid carbon dioxide is also known as dry ice. Unlike the ice cubes in a cold drink , dry ice doesn't melt to become liquid at all. Instead, at room temperature, it changes directly from a solid to a gas a process called sublimation.
This happens because when pressure is decreased, intermolecular forces of attraction or distance between the particles increases.

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