IGNOU BCHCT 137 Solved Assignment Coordination Chemistry, States Of Matter And Chemical Kinetics 2023-2024 English

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This is a Core Course for students who have opted program BSCG under IGNOU BCHCT 137 Coordination Chemistry, States Of Matter And Chemical Kinetics 2023-2024 With CBCS Pattern. We Provide the All Assignment Questions And Their Solutions.

BCHCT 137 Assignment Overview

Please check the ‘Assignments’ section in the B. Sc. Programme Guide we sent you after you joined. In this course, 30% of your grade comes from one assignment. It’s split into two parts, A and B, all adding up to 100 marks. To pass, you need at least 35%

BCHCT 137 Assignment Questions Download

Course Code:BCHCT 137
Assignment Code: ASST /TMA /July and January
Total Marks: 100

• ASSIGNMENT Course Code: BCHCT-137
• Assignment Code: BCHCT-137/TMA/2023
• Maximum Marks: 100

Note: Attempt all questions. The marks for each question are indicated against it.
PART A: COORDINATION CHEMISTRY
1 a) In potassium which of the two orbitals 3d and 4s has higher energy? Give reasons.
b) Why are high oxidation states stable when we move from the second to the third row of the transition series?
2 In [Ni(H2O)6]
2+ the observed magnetic moment is higher than the spin-only value explain the reason.
3 Why do the colours arise in lanthanoid ions and why are the colours pale? (5)
4 What is the definition of a complex? Determine the coordination number and the oxidation state of the transition metal ion in the [Co(NH3)6] 3+ complex.
5 What will be the names of the following ligands when they are present in a complex entity:
CN- , O2-, Me2As- , (CH3COCHCOCH3)2 and H2O.
6 What are the different types of structural isomerism? Give example of any one of them.
7 Explain the structure of [MnCl4] with the help of valence bond theory. (5)
8 Predict the geometry of the Ni(CO)4 complex showing their hybridized orbitals. (5)
9 Calculate the crystal field stabilization energy (CFSE) of an octahedral complex with four electrons in the d orbitals.
10 Calculate the spin-only magnetic moment for low-spin octahedral complex of d 5 and d 6 ions. (5)
PART B: STATES OF MATTER & CHEMICAL KINETICS
11 State postulates of kinetic theory of gases and derive the equation: 2 31 pV  mNu .
12 Define mean free path of a molecule. Calculate the mean free path of oxygen molecule at 300
K and 1.013  105
Pa. The collision diameter for the molecule is 1.20  1010 m.
13 What are critical constants? Derive the relationships between the critical constants and van der Waals constants.
14 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.
15 a) What are clock reactions? What type of rate of reaction is determined by these reactions?
b) Derive an expression relating the activation energy with the rate constants at two
different temperatures.
16 The first-order decomposition of N2O5 is studied at 340 K starting with 2.50 g of N2O5. If its amount decreases to 1.50 g in 100 s, then calculate:
a) the rate constant
b) the half life of reaction
c) the time required for the amount of N2O5 to reduce to 0.5 g.
17 What are the various intermolecular forces that are responsible for the conversion of gases into liquids and solids?
18 Explain with suitable diagrams the planes of symmetry and the axes of symmetry in the cubic system.
19 Explain the parameters of a unit cell with the help of a suitable diagram. (5)
20 Tungsten form bcc crystals. Its cell-edge length is 2.18 x10-10. Find the density of tungsten. (Given: Molar mass of tungsten = 183.84 g per mol).

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Instruction For IGNOU BCHCT-137 Solved Assignment 2023-2024

Before you attempt the assignments, please read the instructions carefully provided in the Programme Guide.

• Use only foolscap size writing paper (but not of very thin variety) for writing your answers.
• Leave 4 cm margin on the left, top and bottom of your answer sheet.
• Your answers should be precise.
• Solve this assignment, and submit the complete assignment answer sheets within the due date.
• The assignment answer sheets are to be submitted to your Study Centre within the due date. Answer sheets received after the due date shall not be accepted.

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