$CO_{2}$ is a gas. Write any two of its gaseous properties to justify this. How can we liquefy this gas? Solid $CO_{2}$ is also known as dry ice. Why?
(N/A) $CO_{2}$ has neither a fixed volume nor a fixed shape,which is a characteristic property of gases.
It exerts pressure on the walls of its container due to the random collisions of its molecules.
$CO_{2}$ can be liquefied by applying high pressure and lowering the temperature.
Solid $CO_{2}$ is known as dry ice because it undergoes sublimation,meaning it converts directly from a solid state to a gaseous state at atmospheric pressure without passing through the liquid phase.
It exerts pressure on the walls of its container due to the random collisions of its molecules.
$CO_{2}$ can be liquefied by applying high pressure and lowering the temperature.
Solid $CO_{2}$ is known as dry ice because it undergoes sublimation,meaning it converts directly from a solid state to a gaseous state at atmospheric pressure without passing through the liquid phase.
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$(a)$ Give an example where a change in physical state occurs due to a change in pressure.
$(b)$ State two factors that determine the rate of diffusion of a liquid in another liquid.
$(b)$ State two factors that determine the rate of diffusion of a liquid in another liquid.
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$(a)$ Formation of clouds.
$(b)$ Drying of wet clothes.
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$(b)$ Drying of wet clothes.
$(c)$ Wax melts in the sun.
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$(i)$ Increasing pressure on hydrogen contained in a closed container
$(ii)$ Some hydrogen gas leaking out of the container
$(iii)$ Increasing the volume of the container of hydrogen gas
$(iv)$ Adding more hydrogen gas to the container without increasing the volume of the container
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$(b)$ Spreading of virus on sneezing.
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