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Stoichiometry

Stoichiometry
Cv for monoatomic gases is equal to(where, R = gas constant)

2R
3R
1.5 R
R

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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.

2
1
3
4

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Stoichiometry
80 kg of Na₂SO₄ (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na₂SO₄ .10H₂O crystals separate out. The weight fraction of Na₂SO₄ in the remaining solution is

0.24
1
0.18

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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

- 136.5°K
-273°C
0°K
-136.5°C

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Stoichiometry
The heat of vaporisation __________ with increase in pressure.

Decreases
Both B and C
Increases
Becomes zero at critical pressure

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Stoichiometry
Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily at

Yield enhancement
None of these
Product enrichment
Heat conservation

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