Chemistry-II paper (CHEM 103) from BUTEX affiliated colleges' 2023 Level-1 Term-II finals. Questions address mesomeric and hyperconjugative effects, SN1 versus SN2 order, Grignard reagent preparation, aldehyde-ketone reactions, and amine basicity explanations.
Level-1 Term-II, Final Exám-2023
Subject: Chemistry-II (Code: CHEM 103)
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 is meant by mesomeric effect and hyper conjugative effect?
(b) Show that SN1 is a 1st order reaction but 2nd order reaction.
(c) Write the electrophilic and nucleophilic addition reaction.
(d) Write the difference between electromeric effect and inductive effect.
[3+3+3+3=12]
2. (a) What is meant by Grignard reagent with example?
(b) Write the method of preparation of Grignard reagent.
(c) Explain the preparation of 1°, 2° and 3° alcohol from Grignard reagent.