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CHE-04 (January 2025 – December 2025) Assignment Questions
1. a) What is the dimensional formula and SI unit of pressure?
b) State the assumptions made by Langmuir to obtain the absorption isotherm.
2. Using a suitable diagram, explain the most probable speed, the average speed and the root mean square speed
3. Derive van der Waals equation.
4. What is reduced pressure distillation? How is it useful?
5. Name different types of crystal systems. Give one example of the compounds belonging to each of these systems.
6. Define the following terms:
i) Isolated system
ii) Isothermal process
(iii) Adiabatic process
(iv) Isobaric process
(v) Isochoric process
7. Calculate the standard internal energy change for the formation of water at 298 K. The standard enthalpy of formation of H2O (l) at 298 K is – 285.8 kJ mol-1 .
8. How will you calculate the net work done in a Carnot cycle?
9. Explain Nernst heat theorem.
10. Briefly discuss the factors affecting solubility of gases in liquids.
11. Using suitable diagrams, discuss the mutual solubilities of components of the following liquid pairs which have
(a) lower critical solution temperature,
(b) upper critical solution temperature, and
(c) both upper and lower critical solution temperatures.
12. Briefly explain the laws of osmotic pressure.
13. Discuss the phase diagram of KI-H2O system giving the suitable diagram
14. Derive the expression relating equilibrium constant with temperature.
15. (a) What are polyprotic acids? Explain with the help of an example.
(b) Calculate the pH of 1.0 x 10-8 M HCl solution.
16. Discuss Hittorf method of determination of transport numbers.
CHE-04 (January 2024 – December 2024) Assignment Questions
1. (a) Express the height of mercury column and density of mercury in SI Units.
(b) Differentiate between lyophilic and lyophobic sols.
2. Derive the following equation for the collision frequency:
3. Show that for real gases
4. (a) Discuss the factors affecting surface tension of liquids.
(b) Arrange the following in the increasing order of their viscosity:
Glycerol, Benzene, Water
Give reason for your answer.
5. Draw and name fourteen Bravais lattices.
6. Show that for a reversible adiabatic process, TV γ -t is constant.
7. Calculate the standard enthalpy of formation of acetone vapour and acetone liquid. (Enthalpy of vapourisation of liquid acetone is 29 kJ mol-1).
8. Write all the statements of the second law of thermodynamics.
9. The free energy change ΔG for a reaction is -221.00 kJ mol-1 at 298 K and -201.00 kJ at 318 K. Calculate the enthalpy change for the reaction at 308 K.
10. Discuss the boiling point-composition diagram of a liquid mixture showing positive deviation from Raoult’s law.
11. Discuss the principle of steam distillation. Also draw a suitable diagram for this process.
12. Briefly discuss van’t Hoff’s laws of osmotic pressure.
13. Draw and explain the phase diagram for KI-H2O system.
14. Derive the following equation:
15. Show that for the hydrolysis of a salt of a weak acid and a weak base,
16. What is transference number? Discuss the Hittorf method of determination of transport number.
17. What is standard hydrogen electrode? Explain with the help of a suitable diagram.
Give the IUPAC rules for the sign convention in reporting the standard state half cell potentials.
18. For a second order reaction, show that
Also give one example of such a reaction.
19. What is quantum efficiency. Explain its calculation using chemical action meters.
20. Explain the following terms:
(i) Peptisation
(ii) Dialysis.
