Question

answer me the 19th question plz
help me fast

Answer 1

Answer A) *We can liquefy atmospheric gases by decreasing temperature to absolute temperature that is -273°C or 0Kelvin.
*We can increase the pressure very high to compress the gases to liquid form.
*We can also do both at same time by increasing pressure and decreasing temperature we can easily liquefy the atmospheric gases.
B)Dry is made up of CO2 which is a gas at room temperature and when we kept it on the surface it follows the sublimation process*(a process in which a substance directly convert from solid to gas or gas to solid without going into liquid state.)and directly convert into gas therefore it didn't wet the surface.
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