BCHCT-137 EM 2025 SOLVED ASSIGNMENT

Description

Tutor Marked Assignment
BCHCT-137: COORDINATION CHEMISTRY, STATES OF MATTER &
CHEMICAL KINETICS

Course Code: BCHCT-137
Assignment Code: BCHCT-137/TMA/2025
Maximum Marks: 100

Note: Attempt all questions. The marks for each question are indicated against it.

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?
(5)
2. In [Ni(H2O)6]2+ the observed magnetic moment is higher than the spin-only value.
Explain the reason.
(5)
3. Give the most common oxidation states of the lanthanoids. Give their configurations. (5)
4. What is meant by coordination entity and coordination sphere? (5)
5. Give the rules of IUPAC nomenclature for naming complexes (give any five points). (5)
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
(5)
7. Explain ligand isomerism with suitable example. (5)
8. Compare the CFSE of an octahedral complex with that of a tetrahedral complex for
four electrons in the d orbitals.
(5)
9 What is meant by tetragonal distortion in octahedral geometry? (5)
10. Calculate the spin-only magnetic moment for low-spin octahedral complex of d5 and d6 ions. (5)
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.
V
u mN p 3
2

(5)
12. a) State the Dalton’s law of partial pressure and give its significance. (2)
b) Define critical constants and give their expressions in terms of van der
Waals constants.
(3)
13. Explain the London or dispersion forces. Compare it with dipole-dipole forces. (5)
14. With suitable diagrams, explain the axes of symmetry in a cubic system. (5)
15. Explain the Bravais Lattices in orthorhombic crystals. Give suitable diagrams. (5)
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.
(5)
17.
a) List different factors affecting the rates of chemical reactions.
(2)
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.
19.
20.
What is meant by rate of a reaction? List and explain different types of rates used in chemical
kinetics.
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?
Compare the collision theory with Arrhenius theory.