Chemistry-I paper (CHEM 101) from the 2017 Level-1 Term-I finals at BUTEX affiliated colleges. Questions address radioactive element classification, quantum number notation, cobalt complex stability, Werner valency types, conjugate acid-base pairs, and colligative relations.
Level-1 Term-I, Final Exám-2017
Subject: Chemistry-I, Subject 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) Classify the radioactive elements with example.
(b) Discuss any two principles governing for the distribution of electron in an atom.
(c) Write the mathematical notation of quantum numbers.
(d) Write down the general formula of d-block and f-block elements in the periodic table.
[2+5+3+2=12]
2. (a) What are the chemical bonds?
(b) State the concept of molecular orbital theory (MO) with an example.
(c) Why [Co(NH₃)₆]Cl₃ is a stable complex?
(d) Explain with example of primary and secondary Valency.
[2+4+3+3=12]