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Stoichiometry

Stoichiometry
The reverse process of fractional crystallisation is called

Differential distillation
Stripping
Absorption
Leaching

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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.

4
1
3
2

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Stoichiometry
The vapor pressure of a substance, at its melting point, is __________ in the solid state as compared to that in the liquid state.

Less
Same
Either A or B; depends on the nature of the substance
More

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Stoichiometry
1 gm mole of an alcohol whose molecular weight is 74 contains 48 gms of carbon, 10 gms of hydrogen and 16 gms of oxygen. Its molecular formula is

(C₂H₄)2H₂.OH
C₃H21OH
C2H33OH
C₄H9OH

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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
18.33 kJ
10.73 kJ
16.15 kJ

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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

40732
2676
2263
540

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