BCHCT-135 EM 2026 SOLVED ASSIGNMENT

Description

ASSIGNMENT
Solutions, Phase Equilibrium, Conductance, Electrochemistry & Functional
Group Organic Chemistry-II
Core Course in Chemistry

Course Code: BCHCT-135
Assignment Code: BCHCT-135/TMA/2026

PART-(A) (50)

1. Define the following terms: (i) Molarity (M) (ii) Molality (m) (iii) Normality (N) (iv) Mole fraction (x) (v) Parts per million Also give their units.
2. (a) State Raoult’s Law. Also, give its mathematical form.

(b) Give any two applications of solvent extraction.

3. (a) Draw and explain the mutual miscibility curve for phenol – water system.

(b) Discuss the effect of impurities on CST values.

4. (a) Define the following terms: (i) Phase (ii) Components (iii) Degrees of freedom

(b) Write the integrated form of Clausius-Clapeyron equation. What were the two assumptions made by Clausius?

5. Draw and explain the phase diagram of water highlighting its important features.
6. (a) Define conductivity and give its units.

(b) The conductivity of a 0.1 M aqueous solution of acetic acid is found to be 5.3 x 10-4 S cm-1. Calculate the molar conductivity of acetic acid solution at the given concentration.

7. (a) Explain ionic mobility and give its units. Briefly explain the factors affecting it.

(b) List the applications of conductivity measurement.

8. (a) Draw the schematic diagram of a Daniell cell and give the reactions taking place at the electrodes.

(b) What are the functions of a salt bridge?

9. (a) Give an example of a concentration cell with transference.

(b) What is quinhydrone electrode? Give its advantageous and disadvantageous.

10. (a) Discuss any two applications of electrolysis.

(b) Briefly explain the process of electrolysis.

PART-(B)

11. Explain the mechanism of Fischer esterfication reaction.
12. (a) Arrange the different carboxylic acid derivatives in the decreasing order of their reactivity towards nucleophilic substituted reactions and give reason for your answer.

(b) What is Rosenmund reduction? Give an appropriate example for this reaction.

13. (a) Briefly explain the following reactions: (i) Curtius rearrnagement (ii) Schmidt rearrangement

(b) Write the products of reduction of nitrobenzene in basic medium under different conditions.

14. (a) What is diazotisation reaction? Give the products formed by the diazotisation of the following: (i) ethanamine (ii) benzenamine

(b) What is reductive amination? Give the product of the reductive amination of diazonium salt formed by 2,4,6-tribromoaniline.

15. Explain the products formed by the nitrosation reactions of primary, secondary and tertiary amines.
16. (a) How will you obtain valine using Gabriel phthalimide synthesis? Explain.

(b) How will you detect a 2-amino acid using ninhydrin?

17. Discuss Edman degradation of N-terminal identification of peptides giving suitable reactions.
18. Briefly describe the primary, secondary, tertiary and quaternary structures of the peptides and proteins.
19. (a) Write the Fischer projection of D-glucose. Also write the Haworth projections ofa–D glucose and β -D-glucofuranose.

(b) Explain mutarotation using glucose as the example.

20. (a) Write the structures of β-lactose and sucrose with appropriate labelling.

(b) Differentiate between amylose and amylopectin.

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