Mass Transfer
The Schmidt number which is defined as, μ/ρ D, is the ratio of the

Thermal diffusivity to the mass diffusivity
None of these
Momentum diffusivity to the mass dif-fusivity
Momentum diffusivity to the thermal diffusivity

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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

2500
2000
1000
1500

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