An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii)

Mass Transfer
An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii)

Less number of trays are required

More number of trays are required and the residue composition is more dilute in methanol

Composition of the residue remains unchanged

More number of trays are required but the residue composition remains unchanged

Less number of trays are required

More number of trays are required and the residue composition is more dilute in methanol

Composition of the residue remains unchanged

More number of trays are required but the residue composition remains unchanged

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Mass Transfer
If a two phase system is in physical equilibrium; then it means that, the

Total pressure throughout the liquid phase is equal to that throughout the vapor phase

Escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase

Temperature of the liquid phase is equal to that of the vapor phase

All of these

Total pressure throughout the liquid phase is equal to that throughout the vapor phase

Escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase

Temperature of the liquid phase is equal to that of the vapor phase

All of these

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Mass Transfer
In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be

At ground level

10 metres above ground

5 metres above ground

2 metres above the ground

At ground level

10 metres above ground

5 metres above ground

2 metres above the ground

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Mass Transfer
Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the

Mixture (to be separated) shows negative deviation from ideality

Mixture (to be separated) shows positive deviation from ideality

Multicomponent distillation is involved

Relative volatility is reasonably constant

Mixture (to be separated) shows negative deviation from ideality

Mixture (to be separated) shows positive deviation from ideality

Multicomponent distillation is involved

Relative volatility is reasonably constant

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Mass Transfer
In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed

q = 1

q < 1

q = 0

q > 1

q = 1

q < 1

q = 0

q > 1

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Mass Transfer
When a multistage tray tower uses a minimum reflux ratio, it implies

Infinite trays and minimum reboiler heat load

Minimum trays and maximum reboiler heat load

Infinite trays and maximum reboiler heat load

Minimum trays and minimum reboiler heat load

Infinite trays and minimum reboiler heat load

Minimum trays and maximum reboiler heat load

Infinite trays and maximum reboiler heat load

Minimum trays and minimum reboiler heat load

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Mass Transfer

Mass Transfer If a two phase system is in physical equilibrium; then it means that, the

Mass Transfer In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be

Mass Transfer Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the

Mass Transfer In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed

Mass Transfer When a multistage tray tower uses a minimum reflux ratio, it implies

Mass Transfer
If a two phase system is in physical equilibrium; then it means that, the

Mass Transfer
In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be

Mass Transfer
Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the

Mass Transfer
In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed

Mass Transfer
When a multistage tray tower uses a minimum reflux ratio, it implies