Mass Transfer
Flash distillation is suitable for separating the constituents of a binary system, which

Have very close boiling points
Form constant boiling azeotrope
Form minimum boiling azeotrope
Have very wide boiling points

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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
1500
1000

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