Mass Transfer
An example of elutioh is

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

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Mass Transfer
A 25 cm x 25 cm x 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1m x 1m x 1cm flat sheet of the same material is to be dried from one side only.Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is

2000
2500
1000
1500

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