Discussion
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- Question
Roult's law is obeyed by a __________ solution.
Options- A. saturated
- B. molar
- C. normal
- D. none of these
- Correct Answer
- none of these
- 1. 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. Mole fraction of water vapour in the product gases is about
Options- A. 0.19
- B. 0.33
- C. 0.40
- D. 0.67 Discuss
- 2. In osmosis through a semi-permeable membrane, diffusion of the
Options- A. solvent is from low concentration to high concentration region.
- B. solvent is from high concentration to low concentration region.
- C. solute takes place.
- D. none of these. Discuss
- 3. Avogadro number is the number of molecules in one __________ of a gas.
Options- A. gram
- B. kilogram
- C. gm.mole
- D. litre Discuss
- 4. Boiling point of a solution as compared to that of the corresponding solvent is
Options- A. less
- B. more
- C. same
- D. either more or less; depends upon the solvent Discuss
- 5. Kinematic viscosity of 1 m2 /second is equivalent to __________ stokes.
Options- A. 10
- B. 102
- C. 103
- D. 104 Discuss
- 6. Viscosity of atmospheric air may be about __________ centipoise.
Options- A. 0.015
- B. 1.5
- C. 15
- D. 150 Discuss
- 7. Atomic __________ of an element is a whole number.
Options- A. weight
- B. number
- C. volume
- D. radius Discuss
- 8. Pick out the wrong unit conversion.
Options- A. 1 J = 1 W.Second = 107 ergs = 9.5 x 10-4 BTU = 0.2389 calorie
- B. 1 Watt = 746 hp
- C. -
- D. - Discuss
- 9. The heat evolved in the combustion of benzene is represented by the equation:
C6H6 + 7.5 O2 = 6CO2 + 3H2O, ?H = 3264.6 kJ/kg. mole
The heat energy change, when 39 gm of C6H6 is burnt in an open container, will be __________ kJ/kgmole.
Options- A. +816.15
- B. +1632.3
- C. -1632.3
- D. -2448.45 Discuss
- 10. pH value of H2SO4 (5% concentration) is
Options- A. 5
- B. 7
- C. > 7
- D. < 7 Discuss
Stoichiometry problems
Search Results
Correct Answer: 0.19
Correct Answer: solvent is from low concentration to high concentration region.
Correct Answer: gm.mole
Correct Answer: more
Correct Answer: 104
Correct Answer: 0.015
Correct Answer: number
Correct Answer: 1 Watt = 746 hp
Correct Answer: -1632.3
Correct Answer: < 7
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