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

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

2500

2000

1500

1000

2500

2000

1500

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Mass Transfer
A minimum boiling azeotrope is exemplified by

Toluene-benzene

None of these

Acetone-carbon disulphide

Water-isobutyl alcohol

Toluene-benzene

None of these

Acetone-carbon disulphide

Water-isobutyl alcohol

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Mass Transfer
In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.

Smaller than

Equal to

Greater than

Either A, or B ; depends on the type of packing

Smaller than

Equal to

Greater than

Either A, or B ; depends on the type of packing

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Mass Transfer
In a counter-current extractor, as the axial mixing increases, the extraction efficiency

Increases

Depends on the pressure of the system

Remains unchanged

Decreases

Increases

Depends on the pressure of the system

Remains unchanged

Decreases

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Mass Transfer
Molecular diffusion is caused by the

Thermal energy of the molecules

Activation energy of the molecules

Potential energy of the molecules

Transfer of molecules from low concentration to high concentration region

Thermal energy of the molecules

Activation energy of the molecules

Potential energy of the molecules

Transfer of molecules from low concentration to high concentration region

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Mass Transfer
Operating velocity in a packed tower is usually __________ the flooding velocity.

Equal to

More than

Twice

Half

Equal to

More than

Twice

Half

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Mass Transfer

Mass Transfer A minimum boiling azeotrope is exemplified by

Mass Transfer In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.

Mass Transfer In a counter-current extractor, as the axial mixing increases, the extraction efficiency

Mass Transfer Molecular diffusion is caused by the

Mass Transfer Operating velocity in a packed tower is usually __________ the flooding velocity.

Mass Transfer
A minimum boiling azeotrope is exemplified by

Mass Transfer
In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.

Mass Transfer
In a counter-current extractor, as the axial mixing increases, the extraction efficiency

Mass Transfer
Molecular diffusion is caused by the

Mass Transfer
Operating velocity in a packed tower is usually __________ the flooding velocity.