CHE-004 IGNOU Solved Assignment 2026-27

CHE-004 Solved Assignment 2026-27: Verified TMA Solutions for Chemistry (CHE-004)

The following content provides plagiarism-free, university-validated solutions for the CHE-004 TMA, structured per the official IGNOU syllabus. All answers strictly comply with word limits (500/250/100 words) and academic integrity standards.

Key Syllabus Units Covered

• Unit 1: Chemical Bonding and Molecular Geometry

  Solutions include detailed explanations of VSEPR theory, hybridization, and bonding in coordination complexes (e.g., octahedral vs. tetrahedral geometries). Key topics: Lewis structures, resonance, and bond polarity with examples from organic and inorganic compounds.

• Unit 2: Thermodynamics and Chemical Equilibrium

  Covers Gibbs free energy, entropy changes, and Le Chatelier’s principle with solved numerical problems. Includes equilibrium constants (K_eq) for exothermic/endothermic reactions and phase equilibria.

• Unit 3: Organic Reaction Mechanisms

  Step-by-step solutions for SN1/SN2/E1/E2 mechanisms, carbocation stability, and Markovnikov’s rule. Practical examples: hydrolysis of esters, elimination reactions, and free radical substitutions with mechanism diagrams.

• Unit 4: Stereochemistry and Chirality

  Explanation of R/S nomenclature, enantiomers, diastereomers, and optical rotation. Includes Fischer projections and conformational analysis (e.g., cyclohexane chair forms).

• Unit 5: Coordination Chemistry and Spectroscopy

  Solutions for naming coordination compounds (IUPAC rules), crystal field theory, and UV-Vis spectroscopy. Practical: determining ligand field strength and spin states in transition metal complexes.

FAQs for CHE-004 TMA

• Q: How are numerical problems in thermodynamics solved?

  Use the first law (ΔU = q + w), second law (ΔS = q_rev/T), and Gibbs equation (ΔG = ΔH TΔS). Example: Calculate ΔG° for a reaction given K_eq using ΔG° = –RT ln K.

• Q: What are the key differences between SN1 and SN2 reactions?

  SN1: Two-step, carbocation intermediate, racemization, rate = [substrate]. SN2: One-step, backside attack, inversion of configuration, rate = [substrate][nucleophile]. Solved examples include substrate reactivity trends (e.g., 3° > 2° > 1°).

Assignment Structure and Submission

The TMA carries 30% course weightage and must be submitted within the deadline (check IGNOU’s official session-wise timeline). Solutions are provided in PDF format with:

• Strict word limit compliance (500/250/100 words per question).
• Diagrams for mechanisms and molecular geometries (where applicable).
• Cross-referenced answers with Block-1 to Block-5 of the official CHE-004 syllabus.

Note: All solutions are generated using verified IGNOU resources (study materials, block notes, and past TMA papers). Avoid plagiarism by citing direct references to Block notes (e.g., ‘As per Block-3, Section 3.2’).