MCHE-012 IGNOU Solved Assignment 2026-27

Spectroscopic Study of Organic Compounds: Core Insights and Assignment Mastery

MCHE-012: Spectroscopic Study of Organic Compounds is a specialized course under IGNOU’s M.Sc. (Chemistry) program, designed to equip students with advanced analytical techniques for elucidating molecular structures. This course bridges theoretical foundations with practical applications, emphasizing the interpretation of UV-Vis, IR, NMR, and mass spectrometry data. Through rigorous study of spectral correlation tables and computational tools, learners develop precision in identifying functional groups, stereochemistry, and reaction mechanisms—critical skills for modern chemical research.

Key Syllabus Units & Topics

• Block-1: Covers fundamental principles of molecular spectroscopy, including electromagnetic radiation interactions with organic molecules, Beer-Lambert law, and calibration techniques for UV-Vis spectroscopy.
• Block-2: Focuses on infrared spectroscopy, detailing vibrational modes, group frequency correlations, and spectral interpretation strategies for aliphatic/aromatic compounds.
• Block-3: 13C NMR and 2D NMR Spectroscopy: Explores carbon-13 NMR chemical shifts, spin-spin coupling patterns, and advanced techniques like COSY, HSQC, and NOESY for structural confirmation.
• Block-4: Integrates mass spectrometry principles, including fragmentation patterns, high-resolution techniques, and tandem MS applications for molecular weight determination.

Frequently Asked Questions

Q: What is the minimum pass percentage required for MCHE-012 TMA submissions?
A: IGNOU mandates a minimum of 40% marks in each TMA component to qualify for internal assessment; partial credit is awarded for logical reasoning, even if exact numerical answers are missed.

Q: Are there specific guidelines for referencing spectroscopic data in the TMA answers?
A: Yes; students must cite exact wavenumbers (IR), chemical shifts (NMR), or m/z values (MS) with units, and explain their significance in relation to structural features—omitting units or vague terms (e.g., "high intensity") deducts marks.