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STOICHIOMETRY

Stoichiometry
Which of the following is not a colligative property?

Depression of freezing point
Osmotic pressure
None of these
Lowering of vapor pressure

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Stoichiometry
The value of Trouton's ratio (λb/Tb) for a number of substances is 21 (where, λb = molal that of vaporisation of a substance at its normal boiling point, KCal/kg. mole and Tb = normal boiling point, °K). The Kis-tyakowsky equation is used for calculation of Trouton's ratio of __________ liquids.

Polar
Neither A nor B
Both A & B
Non-polar

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Stoichiometry
The total volume occupied by a gaseous mixture is equal to the sum of the pure component volumes. This is the __________ law.

Dalton's
Avogadro's
GayLussac's
Amgat's

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Stoichiometry
S.T.P. corresponds to

1 atm. absolute pressure & 15.5°C
101.325 kPa gauge pressure & 15.5°C
760 torr & 0°C
760 mm Hg gauge pressure & 15.5°C

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Stoichiometry
The vapor pressures of benzene and toluene are 3 and 4/3 atmospheres respectively. A liquid feed of 0.4 moles of benzene and 0.6 moles of toluene is vapourised. Assuming that the products are in equilibrium, the vapor phase mole fraction of benzene is

0.8
0.2
0.6
0.4

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