BCHCT-135 SOLUTIONS, PHASE EQUILIBRIUM, CONDUCTANCE, ELECTROCHEMISTRY & FUNCTIONAL GROUP ORGANIC CHEMISTRY-II
Solved Assignment 2020-2021
Solutions, Phase Equilibrium, Conductance, Electrochemistry & Functional
Group Organic Chemistry-II
Core Course in Chemistry
Course Code: BCHCT-135
Assignment Code: BCHCT-135/TMA/2020-2021
Maximum Marks: 100
|Title Name||BCHCT-135 Solved Assignment 2020-2021|
|Service Type||Solved Assignment (Soft copy/PDF)|
|Semester||2020-2021 Course: B.SC(G) CBCS|
|Short Name||BCHCT-135 (ENGLISH)|
|Product||Assignment of BSCG 2020-2021 (IGNOU)|
|Submission Date||This assignment is valid from 1st January 2021 to 31st December, 2021. If you have failed in this
assignment or fail to submit it by December, 2021, then you need to get the assignment for the
year 2022, and submit it as per the instructions given in the Programme Guide.
Note: Attempt all questions. The marks for each question are indicated against it.
1. Define the following terms
b) Ideal solutions
c) Conjugate solutions
d) Metastable equilibrium
e) Condensed systems
f) Congruent melting point
g) Ionic mobility
h) Conductivity water
i) Standard electrode potential
j) Concentration cells
2. How is the solubility of a gas affected by different factors? Explain. (5)
3. What is the critical solution temperature? Draw and explain the variation of mutual solubility of
two liquids which exhibit upper CST.
4. a) What is a phase? What is the maximum number of phases possible for a one-component system? (2)
b) Solid ammonium chloride undergoes sublimation on heating. In the vapour phase ammonium
chloride decomposes to give NH3(g) and HCI(g). The following equilibrium is established.
NH4Cl(s) ⇌ NH3(g)+ HCl (g)
What is the number of
i) phases in the system,
ii) components in the system, and
iii) degrees of freedom of the system?
5. a) Give the significance of critical point in the phase diagram of water. (2)
b) Draw the phase diagram for water system and label the one, two and three phase equilibria on
6. a) Differentiate between conductivity and molar conductivity of a solution. (2)
b) A conductivity cell having a cell constant of 0.5 cm
filled with 0.02 M solution of KCl at
298 K gave a resistance of 20.2 Ω. The water used for preparing the solution had a conductivity
of 7.1 × 10–6 S cm–1. Calculate the molar conductivity of 0.02 M KCl solution.
7. a) What are transference numbers and how are they related to ionic mobilities? (2)
b) In the determination of transference numbers of HCl by moving boundary method a 0.10 M
solution of HCl was taken in a cell having uniform area of cross section of 1.6 cm2
. At the end of
experiment the boundary moved by 11.7 cm and 0.22 g of silver was deposited on the cathode of
silver coulometer. Calculate the transference numbers of ions of HCl.
8. a) Differentiate between voltaic and electrolytic cells. (2)
b) The cell reaction for a galvanic cell is given below:
Zn(s) + 2Ag+
(aq) →Zn2+ (aq) + 2Ag(s)
i) Write the half-cell reactions at the anode and the cathode.
ii) Calculate the value of cell emf under standard conditions; use data from Table 7.1.
iii) Will the reaction be spontaneous as written?
9. a) Calculate the amount of chlorine gas evolved during the electrolysis of molten potassium
chloride on passing a current of 0.5 A for two hours through it.
b) Define a potentiometric titration and draw a schematic graph of a redox potentiometric titration. (3)
10. Explain the acidic and basic behavior of carboxylic acids. (5)
11. How will you carry out the following conversions? (5)
i) 2- Chlorobutane to 2-Methylbutanoic acid.
ii) 1- Bromobutane to Pentanoic acid.
12. How can a carboxylic acid be converted to a carboxylic acid chloride using different reagents? How
will you convert the acid chlorides to
i) other halides, and
ii) the starting carboxylic acid?
13. Explain the reduction of nitrobenzene using different reagents. (5)
14. What is diazo coupling? Write the reaction for the preparation of Congo red dye using this
15. Explain the following for an amino acid: (5)
i) Zwitterionic nature
ii) Isoelectric point
16. Discuss the protection and deprotection of amino group of an amino acid by Cbz and
17. Explain the Sanger method of identification of N-terminal of a peptide. (5)
18. Describe the formation of osazones by glucose and mannose. How are there two carbohydrates
related to each to each other?
19. Write the structures for the sucrose and products of hydrolysis. Also write their names. (5)
BCHCT-135, BCHCT 135, BCHCT135