Chemistry-I paper (CHEM 101) from the 2022 Level-1 Term-I finals, BUTEX affiliated colleges. Includes quantum number relations, Heisenberg's principle, Fajan's rule applications, HF molecular orbitals, Werner's theory, and HSAB examples.
Level-1 Term-I, Final Exám-2022
Subject: Chemistry-I (Code: CHEM 101)
Time: 3.0 Hrs. Full Marks: 72
(Use separate answer script for Part: A and Part: B)
(All parts of a question must be answered consecutively)
Part: A
(Answer any three questions)
1. (a) What are quantum numbers?
(b) Write down the relation between quantum numbers when the principal quantum number, n=3.
(c) State and explain Heisenberg’s uncertainty principle.
(d) How does electron affinity changes in a period and a group of the periodic table?
[2+3+4+3=12]
2. (a) Explain the following postulates of Fajan’s rule:
(i) Size of cation (ii) Size of anion
(b) Why does MgCl₂ is more covalent than NaCl?
(c) What are the basic principles of Molecular orbital theory (MOT)?