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Stoichiometry

Stoichiometry
The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be __________ times.

43834
4
43832
√2

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Stoichiometry
If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will

Increase two times
Increase four times
None of these
Be reduced to l/4th

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Stoichiometry
Assuming that CO₂ obeys perfect gas law, calculate the density of CO₂ (in kg/m³) at 263°C and 2 atm.

1
2
4
3

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Stoichiometry
The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal __________ in the two phases.

Intermolecular forces
Kinetic energy
Potential energy
Total energy

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Stoichiometry
__________ kg of CaCO₃ on heating will give 56 kg of CaO.

56
1000
144
100

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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

Cm/s
M/s
Mole/m².s.Pa
Kmole/m².s.Pa

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