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BCHCT 137 Coordination Chemistry

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IGNOU BCHCT-137- Solved Assignment

Are you looking to download a PDF soft copy of the Solved Assignment BCHCT 137 Coordination Chemistry is the right place for you. This particular Assignment references the syllabus chosen for the subject of Hindi, English, for the Jul 25 – Jan 26, Jul 24 – Jan 25 session. The code for the assignment is BCHCT-137 and it is often used by students who are enrolled in the BSC (Honours), IGNOU CBCS Solved Assignments Degree. Once students have paid for the Assignment, they can Instantly Download to their PC, Laptop or Mobile Devices in soft copy as a PDF format. After studying the contents of this Assignment, students will have a better grasp of the subject and will be able to prepare for their upcoming tests.

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IGNOU BCHCT-137 (January 2025 – December 2025) Assignment Questions

PART A: COORDINATION CHEMISTRY
1. What is the general electronic configuration of elements of the second transition series? Which d orbitals are filled up here?
2. In [Ni(H2O)6] 2+ the observed magnetic moment is higher than the spin-only value. Explain the reason.
3. Give the most common oxidation states of the lanthanoids. Give their configurations.
4. What is meant by coordination entity and coordination sphere?
5. Give the rules of IUPAC nomenclature for naming complexes (give any five points).
6. According to valence bond theory, how do you account for the indicated molecular geometry for the following compounds:
(i) [Fe(CN)6]3- – Octahedral and (ii) [GaCl4]- – Tetrahedral
7. Explain ligand isomerism with suitable example.
8. Compare the CFSE of an octahedral complex with that of a tetrahedral complex for four electrons in the d orbitals.
9 What is meant by tetragonal distortion in octahedral geometry?
10. Calculate the spin-only magnetic moment for low-spin octahedral complex of d5 and d6 ions.
PART B: STATES OF MATTER & CHEMICAL KINETICS
11. State the assumptions of kinetic theory of gases and derive the following expression for the pressure of a gas.
12. a) State the Dalton’s law of partial pressure and give its significance.
b) Define critical constants and give their expressions in terms of van der Waals constants.
13. Explain the London or dispersion forces. Compare it with dipole-dipole forces.
14. With suitable diagrams, explain the axes of symmetry in a cubic system.
15. Explain the Bravais Lattices in orthorhombic crystals. Give suitable diagrams.
16. The density and cell-edge length of sodium chloride are 2.163 X 103  kg m-3 and 5.63 X l0-10 m, respectively. Using these data, arrive at the number of formula units per unit cell of sodium chloride crystal.
 17. a) List different factors affecting the rates of chemical reactions.
b) Derive the integrated rate equation for a second order reaction in which a single reactant forms the product and the reaction rate depends on the second power of the reactant concentration.
18. What is meant by rate of a reaction? List and explain different types of rates used in chemical kinetics.
19. If the half-life of a first order reaction in A is 15 min, how long will it take for [A] to reach 10 percent of the initial concentration?
20. Compare the collision theory with Arrhenius theory.

IGNOU BCHCT-137 (January 2024 – December 2024) Assignment Questions

PART A: COORDINATION CHEMISTRY

1. a) What is the ground state configuration of Sc+ ion? Justify.
b) Why zinc and cadmium are soft metals?

2. What is the composition of brass? Is it harder than pure copper? Give its uses.

3. Why do lanthanoids mainly show ionic bonding? What is the nature of their melting and boiling points?

4. What are the possible number of isomers for the octahedral complex ion [Co(NH3)Cl2]+?

5. What type of isomerism is exhibited in the complexes [Co(NH3)5(SO4)] Br and [Co(NH3)5Br]SO4?

6. Give the hybridized orbitals and the corresponding geometries of [Ti(H2O)6]3+ and [CoCl4]2-.

7. Explain the directional properties of the five d orbitals in a free transition metal ion with the help of suitable diagrams.

8. Give the CFSE of an octahedral complex with seven electrons in the d orbitals.

9 Give the possible electronic configurations for d3 and d6 systems in a tetrahedral crystal field.

10. Which are the cases when tetrahedral geometry is favoured over octahedral geometry for metal complexes? Why are they so?

PART B: STATES OF MATTER & CHEMICAL KINETICS

11. Calculate the i) average speed ii) root mean square speed and iii) most probable speed of oxygen molecules at 515 K. (Given Mm(O2) = 0.016 kg mol-1)

12. State the Dalton’s law of partial pressure and give its significance.

13. Explain the pressure and volume correction terms to the ideal gas equation, and deduce van der Waals equation.

14. What is meant by rate of a reaction? List and explain different types of rates used in chemical kinetics.

15. With suitable example and figure explain the integrated rate law for first order reaction.

16. For the reaction, Cl2(g)+2NO(g) → 2NOCl(g), the initial concentrations, [Cl2]0 and [NO]0 are given below along the corresponding with initial rates.

Determine (i) the order of the reaction with respect to NO and Cl2; (ii) the rate law; and (iii) the rate constant

17. Give the reasons for the striking contrast in the boiling points of ethanol (351 K) and dimethyl ether (249 K). Give suitable diagrams to illustrate this.

18. What are the elements of symmetry? Give the suitable diagrams for any one of them.

19. Explain close packing in two dimensions for a crystalline solid with the help of a suitable diagram.

20. Give the consequences of Schottky and Frenkel defect.

IGNOU BCHCT-137 ASSIGNMENTS DETAILS

University : IGNOU (Indira Gandhi National Open University)
Title : Coordination Chemistry, States of Matter and Chemical Kinetics
Language(s) : English, Hindi
Code : BCHCT-137
Degree : BSCG
Subject : Chemistry
Course : Core Courses (CC)
Author : ignouedumart.com Panel
Publisher : Distance Gyan Publishing House Pvt. Ltd.

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