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Stoichiometry

Stoichiometry
Solutions which distil without change in composition are called

Azeotropic
Saturated
Supersaturated
Ideal

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Stoichiometry
Enthalpy of formation of NH₃ is - 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH₃ → N₂ + 3H₂, is equal to __________ kJ/kg. mole.

92
46
-92
-23

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Stoichiometry
In a binary liquid system, the composition expressed as __________ is independent of the temperature & pressure.

All of these
Kg of solute/kg of solvent
Kg-mole of solute/1000 kg of solvent
Kg-mole of solute/kg-mole of solvent

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Stoichiometry
Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the

Same elevation in boiling point
Different elevation in boiling point
Elevation in boiling point in the ratio of their molecular weights
None of these

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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

10.73 kJ
18.11 kJ
18.33 kJ
16.15 kJ

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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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