Mass Transfer
Relative volatility does not change appreciably with the change in

Vapour pressure of either component
None of these
Total pressure
Temperature

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Mass Transfer
An example of elutioh is

Separation of uranium oxide from its ore by H₂SO₄ in a Pachuca tank
Dissolution of tannin out of tree barks by water
Recovery of vegetable oils from seeds
Separation of sugar from sugar beet by hot water

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