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Stoichiometry

Stoichiometry
If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.

20
70
100
10

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Stoichiometry
'Cox' chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the

Temperature vs. log (vapor pressure)
Log (temperature) vs. log (vapor pressure)
Vapor pressure vs. log (temperature)
Vapor pressure vs. temperature

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Stoichiometry
Dry air is a mixture of

Vapors
Both A & B
Neither A nor B
Gases

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Stoichiometry
One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m³. It cools to 98°C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m³. The latent heat of condensation (kJ/kg⁻¹ ) under these conditions is

2263
40732
540
2676

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Stoichiometry
Heat capacity of air can be approximately expressed as, Cp = 26.693 + 7.365 x10⁻³ T, where, Cp is in J/mole.K and T is in K. The heat given off by 1 mole of air when cooled at atmospheric pressure from 500°C to - 100°C is

18.11 kJ
16.15 kJ
10.73 kJ
18.33 kJ

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Stoichiometry
Gases having same reduced temperatures and reduced pressures

Neither A nor B
Both A & B
Deviate from ideal gas behaviour to the same degree
Have nearly the same compressibility factor

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