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Stoichiometry

Stoichiometry
°API gravity of water at N.T.P. is about

10
100
1

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Stoichiometry
A gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be

-273°C
-136.5°C
- 136.5°K
0°K

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Stoichiometry
The heats of vaporisation of CS₂, C₂H₅OH &H₂O are 26.8, 38.6 & 40.6 KJ/kg mole respectively. The order of decreasing inter-molecular forces in these liquids is

H₂O > CS₂ > C₂H₅OH
CS₂ > C₂H₅OH > H₂O
CS₂ > H₂O > C₂H₅OH
H₂O > C₂H₅OH > CS₂

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Stoichiometry
At room temperature, the product [H⁺] [OH⁻] in a solution is 10⁻¹⁴ moles/litre. If, [OH⁻] = 10⁻⁶ moles/litre, then the pH of the solution will be

10
8
12
6

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Stoichiometry
Enthalpy of a vapor gas mixture may be increased by increasing the

All of these
Temperature and the humidity
Humidity at constant temperature
Temperature at constant humidity

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Stoichiometry
Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are PvB and Pvw respectively. The partial pressure of benzene in air-vapour mixture is

PvB
XB.PvB
(Patm - Pvw)xB
XB.Patm

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