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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.

4
√2
43834
43832

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Stoichiometry
The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be

Of the same acidity
More acidic
Neutral
Basic

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Stoichiometry
With rise in temperature, the heat capacity of a substance

Either A or B; depends on the substance
Decreases
Remains unchanged
Increases

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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

540
40732
2263
2676

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Stoichiometry
In the reaction, Ca + 2H₂O = Ca(OH)₂ + H₂ ; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water? (atomic weight of calcium = 40)

4480
2240
1120
0.4

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Stoichiometry
The osmotic pressure of a solution is directly proportional to the

Absolute temperature of a given concentration
All of these
Lowering of vapor pressure
Molecular concentration of the solute

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