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- Question
No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules
Options- A. collide without loss of energy.
- B. do work equal to loss in kinetic energy.
- C. are above the inversion temperature.
- D. exert no attractive force on each other.
- Correct Answer
- are above the inversion temperature.
- 1. Pick out the correct statement.
Options- A. Heat of solution is always positive.
- B. At equilibrium, ?G is zero.
- C. For the reaction, PCl5⇌PCl3 + Cl2, ?G is less than ?E
- D. The heating of water in a beaker is an example of an isolated system. Discuss
- 2. Normality of a solution does not change with the increase in the
Options- A. pressure
- B. temperature
- C. solute concentration
- D. dilution of the solution Discuss
- 3. A solution of specific gravity 1 consists of 35% A by weight and the remaining B. If the specific gravity of A is 0.7, the specific gravity of Bis
Options- A. 1.25
- B. 1.3
- C. 1.35
- D. 1.2 Discuss
- 4. Pick out the wrong unit conversion.
Options- 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. Discuss
- 5. A sugar solution containing __________ percent sugar is equivalent to 1 Brix.
Options- A. 0.01
- B. 0.1
- C. 1
- D. 10 Discuss
- 6. The heat of solution depends upon the
Options- A. nature of solvent
- B. concentration of solution
- C. nature of solute
- D. all (a), (b) & (c) Discuss
- 7. "The equilibrium value of the mole fraction of the gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid surface". This statement pertaining to the solubility of gases in liquid is the __________ law.
Options- A. Raoult's
- B. Henry's
- C. Amgat's
- D. none of these Discuss
- 8. One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 ? CO2 + 2H2O. Both the reactants and products are in gas phase. ?H°298 = - 730 kJ/mole of methane. If the average specific heat of all the gases/vapour is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to
Options- A. 1225
- B. 1335
- C. 1525
- D. 1735 Discuss
- 9. pH value of a solution containing 1 gm of hydrogen ion per litre will be
Options- A. 0
- B. 1
- C. 7
- D. 10 Discuss
- 10. 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
Options- A. 0.00
- B. 0.18
- C. 0.24
- D. 1.00 Discuss
Stoichiometry problems
Search Results
Correct Answer: At equilibrium, ?G is zero.
Correct Answer: pressure
Correct Answer: 1.2
Correct Answer: 1 stoke = 1 m2/second.
Correct Answer: 1
Correct Answer: all (a), (b) & (c)
Correct Answer: Henry's
Correct Answer: 1735
Correct Answer: 0
Correct Answer: 0.18
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