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Stoichiometry

Stoichiometry
Vapor pressure of a solution is proportional to(where, Sv and St are mole fraction of solvent and solute respectively).

1/Sv
St
1/St
Sv

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Stoichiometry
The density of a gas at N.T.P.is 'ρ'. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become ¾ 0.75ρ at a temperature of __________ °K

400°
300°
273°
300°

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Stoichiometry
One 'Therm' is equivalent to

10⁹ kcal
10⁵ kcal
10⁵ BTU
10⁹ BTU

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Stoichiometry
Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m³ . The diffusivity of aniline in air is 0.74xl0-5m²/s.The numerical value of mass transfer co-efficient is 7.4 x 10-3. Its units are

Kmole/m².s.Pa
Mole/m².s.Pa
Cm/s
M/s

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Stoichiometry
The atomic heat capacities of all solid elements __________ with decrease in temperature.

Increases
Decreases
Remains unchanged
Approach zero at 0°C

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Stoichiometry
Which of the following is not a unit of length?

Barn
Parsec
Angstrom
Fermi

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