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Theoretical Chemistry

This document is an examination paper for the second semester of a Chemistry course, focusing on Theoretical and Inorganic Chemistry. It includes three sections: short answers, paragraph questions, and an essay question, covering topics such as quantum mechanics, molecular orbital theory, and atomic structure. The exam is scheduled for April 2023 and has a maximum score of 60 marks.

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kabeerbushra782
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21 views2 pages

Theoretical Chemistry

This document is an examination paper for the second semester of a Chemistry course, focusing on Theoretical and Inorganic Chemistry. It includes three sections: short answers, paragraph questions, and an essay question, covering topics such as quantum mechanics, molecular orbital theory, and atomic structure. The exam is scheduled for April 2023 and has a maximum score of 60 marks.

Uploaded by

kabeerbushra782
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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C 43159 (Pages : 2) Name.........................................

Reg. No.....................................

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SECOND SEMESTER (CBCSS—UG) DEGREE EXAMINATION
APRIL 2023

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Chemistry

CHE 2B 02—THEORETICAL AND INORGANIC CHEMISTRY—II

(2019—2022 Admissions)

Time : Two Hours Maximum : 60 Marks

Section A (Short Answers)

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Answer any questions up to 20 marks.
Each question carries 2 marks.

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1. State Heisenberg uncertainty principle.

2. What is the work function for photo electric effect ?

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3. Derive de Broglie’s relationship.

4. Write the Rydberg relation for hydrogen spectrum. Calculate the wave number of second line in
Baimer series.

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5. Write any four postulates of Bohr model of hydrogen atom.

6. What are eigen functions and eigen values ?

7. Write the Schrodinger wave equation of hydrogen atom using spherical polar co-ordinates.

8. Draw the potential energy diagram for H2 molecule formation.

9. What is Hamiltonian operator ?

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10. Calculate the bond order of N2 molecule.

11. What is Hybridization ?

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12. Draw the shapes of PCl5 and IF7 molecules.

[Ceiling of marks: 20]

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2 C 43159

Section B (Paragraph)

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Answer questions up to 30 marks.
Each question carries 5 marks.

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13. Draw the molecular orbital diagram of CO molecule. Calculate its bond order ?

14. Define LCAO of central atom. Explain sp hybridization of BeH2 and sp2 hybridization of BH3
using LCAO approximation.

15. Derive an expression for energy for a particle in a one dimensional box.

16. What is Born Oppenheimer approximation ? What is its significance ?

17. Briefly describe the importance of variation theorem in quantum mechanics.

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18. Describe Stern-Gerlach experiment. What is its significance in determining atomic structure ?

19. Derive the expression to determine Bohr radius and energy of electron in the K shell (n = 1) of

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hydrogen atom.

[Ceiling of marks : 30]

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Section C (Essay)

Answer any one question.


The question carries 10 marks.

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20. Write the postulates of quantum mechanics. Derive time independent Schrodinger wave equation
for particle in one dimensional box. Draw the radial probability distribution curves of 1s, 2s and 2p
orbitals.

21. What is quantum mechanical concept of chemical bonding ? Explain bonding in following species

(a) H2 molecule using VB theory.

(b) H2+ ion using MO theory.

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(1 × 10 = 10 marks)

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