- A. Normal condensation
- B. Wetting
- C. Sum of A and B
- D. Difference of A and B
Stoichiometry
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The heat of adsorption of a gas caused by Van der Walls forces of attraction and capillarity is equal to the heat of_____.
-
The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about _____ kcal/kg.mole of water formed.
- A. 6680
- B. 13360
- C. 2481
- D. 97302
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In the reaction, represented by Na₂CO₃ + HC₁ → NaHO₃ + NaCl, the equivalent weight of Na₂CO₃ is_____.
- A. 53
- B. 5.3
- C. 106
- D. 10.6
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Othmer chart is useful in estimating the heat of_____.
- A. Mixing
- B. Wetting
- C. Adsorption
- D. None of these
-
The pressure of ‘V’ litres of a dry gas is increased from 1 to 2 kgf/cm² at a constant temperature. The new volume will become_____.
- A. V/2
- B. 2V
- C. V/4
- D. V²
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Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent?
- A. Temperature
- B. Nature of solute
- C. Pressure
- D. Nature of solvent
-
Pick out the wrong statement.
- A. The evaporation of aqueous solution of glucose causes its molarity to increase
- B. Both the freezing point as well as boiling point of sea water is more than that of distilled water
- C. The solution containing equal masses of two liquids ‘X’ and ‘Y’ has the same mole fraction of’ ‘X’ and ‘Y’
- D. Both B and C
-
Pick out the wrong unit conversion_____.
- A. L kgf= 9.8 Newton
- B. 1 stoke = 1 m²/second
- C. 1 Pascal second = 10 poise
- D. 1 ppm = 1 ml/m³ = 1 mg/kg
-
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_____.
- A. C₄H9OH
- B. C₃H21OH
- C. (C₂H₄)2H₂.OH
- D. C2H33OH
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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.
- A. 46
- B. 92
- C. -23
- D. -92