Discussion
Home ‣ Chemical Engineering ‣ Stoichiometry Comments
- Question
Mass number of an atom is the sum of the numbers of
Options- A. neutrons and protons
- B. protons and electrons
- C. neutrons and electrons
- D. both(a)&(b)
- Correct Answer
- both(a)&(b)
- 1. Volume percent for gases is equal to the
Options- A. weight percent.
- B. mole percent.
- C. weight percent only for ideal gases.
- D. mole percent only for ideal gases. Discuss
- 2. Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m3 . The diffusivity of aniline in air is 0.74xl0-5m2/s.The numerical value of mass transfer co-efficient is 7.4 x 10-3. The rate of evaporation of aniline is 2.97 x 10-4. Its units are
Options- A. mole/s
- B. mole/cm2. s
- C. mole/m2 . s
- D. kmole/m2 . s Discuss
- 3. In a binary liquid solution of components A and B, if component A exhibits positive deviation from Raoult's law, then component B
Options- A. exhibits positive deviation from Raoult's law.
- B. exhibits negative deviation from Raoult's law.
- C. obeys Raoult's law.
- D. may exhibit either positive or negative deviation from Raoult's law. Discuss
- 4. The elevation in boiling point of a solution is proportional to the __________ of the solution.
Options- A. molal concentration
- B. reciprocal of the molal concentration
- C. normality
- D. molarity Discuss
- 5. Pick out the wrong statement.
Options- 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) Discuss
- 6. Heat of reaction is not influenced by
Options- A. the route/method through which final products are obtained.
- B. the physical state (e.g., solid, liquid or gaseous) of reactants and products.
- C. whether the reaction is carried out at constant temperature or constant pressure.
- D. none of these. Discuss
- 7. Internal energy of a substance comprises of the __________ energy.
Options- A. vibrational
- B. rotational
- C. translational
- D. all (a), (b) & (c) Discuss
- 8. 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
Options- A. V/2
- B. 2V
- C. V/4
- D. V2 Discuss
- 9. During a phase change process like sublimation, vaporisation, melting etc., the specific __________ does not change.
Options- A. enthalpy
- B. Gibbs free energy
- C. internal energy
- D. entropy Discuss
- 10. The number of atoms of oxygen present in 11.2 litres of ozone (O3) at N.T.P. are
Options- A. 3.01 x 1022
- B. 6.02 x 1023
- C. 9.03 x 1024
- D. 1.20 x 1024 Discuss
Stoichiometry problems
Search Results
Correct Answer: mole percent only for ideal gases.
Correct Answer: kmole/m2 . s
Correct Answer: exhibits positive deviation from Raoult's law.
Correct Answer: molal concentration
Correct Answer: both (b) and (c)
Correct Answer: the route/method through which final products are obtained.
Correct Answer: all (a), (b) & (c)
Correct Answer: V/2
Correct Answer: Gibbs free energy
Correct Answer: 9.03 x 1024
Comments
There are no comments.More in Chemical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.