Mass Transfer
Absorption accompanied with chemical reaction is exemplified by the absorption of

All of these
Ammonia in water
Benzol present in coke oven gas by wash oil
SO₂ in alkaline solution

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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

1000
1500
2500
2000

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