Chemistry-I exam (CHEM 101) from BUTEX affiliated colleges' 2023 Level-1 Term-I finals. Questions cover orbital overlap with SP3 hybridization in methane, EAN rule stability, magnetic properties of iron complexes, MOT bond orders, and freezing point molecular weight numericals.
Level-1 Term-I, Final Exám-2023
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 do you mean by the overlapping of orbitals?
(b) Draw the energy diagram of S-S overlap for covalent bond.
(c) Show the SP³ hybridization in CH₄ with geometrical shape.
(d) Why does AgI is more covalent than AgCl?
[3+3+3+3=12]
2. (a) Why HClO₄ is strong acid than H₃PO₄.
(b) Explain the magnetic properties of the following compounds:
(i) K₄[Fe(CN)₆] (ii) K₃[Fe (CN)₆]
(c) Discuss the stability of K₄[Fe (CN)₆] in terms of EAN rule.
(d) What are primary and Secondary valency?