Which of the following system does not have a interface?
A
Solid-gas
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B
Liquid-liquid
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C
Gas-Gas
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D
None of the above
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Solution
The correct option is C Gas-Gas Surface/Interface: Boundary that separates two bulk phases.
The surface/ interface is normally a few molecules thick but its area depends on the size of the particles of bulk phases.
There is no interface between the gases due to complete miscibility.