Mass Transfer

401.Separation of _________ employs gaseous diffusion process.

1. N2 and O₂ from air
2. Isotopes of uranium
3. Isotopes of helium
4. SO₂ and air

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402.Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their

1. Viscosity
2. Density
3. Solubility
4. Relative volatility

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403.Separation of the isotopes of helium for scientific investigations is done by

1. Reverse osmosis
2. Thermal diffusion
3. Leaching
4. Solvent extraction

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404.Separation of two or more components of a liquid solution cannot be achieved by

1. Fractional crystallisation
2. Liquid extraction
3. Absorption
4. Evaporation

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405.Separation of two volatile liquids by distillation makes use of their

1. Selectivity
2. Relative volatility
3. Solubility
4. Density difference

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406.Sides of equilateral-triangular co-ordinates (on which ternary liquid system is plotted) represent

1. A pure component
2. A binary mixture
3. A ternary mixture
4. Partially miscible ternary system

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407.Small dia distillation column can be a

1. Packed column
2. Sieve tray
3. Bubble cap
4. Any of these

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408.Smoke is an example of

1. Solid dispersed in liquid
2. Solid dispersed in gas
3. Liquid dispersed in gas
4. Gas dispersed in liquid

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409.Sodium bicarbonate is produced during soda ash manufacture using a _________ tower.

1. Plate
2. Baffle
3. Packed
4. None of these

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410.Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when

1. Extracting solvent is cheaply & abundantly available
2. One of the liquid components is heat sensitive
3. Viscosity of liquid components is very high
4. One of the liquid components has very high affinity towards the solvent

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