CHE-001-CHE-002 IGNOU Guess Paper 2026-27

CHE-001 (Chemistry) Guess Paper 2026–27 (Term-End Exam)

This digital guess paper aligns with the official IGNOU CHE-001 syllabus, emphasizing high-weightage topics from past TEE sessions (June/December). Structured for 3-hour exam efficiency, it includes solved patterns, chapter-wise question distribution, and time management strategies.

Key Syllabus Blocks Covered

• Unit 1: Fundamentals of Chemistry
  • Atomic structure (quantum numbers, orbital shapes) expect 2–3 numericals on Bohr’s model and photoelectric effect.
  • Periodic trends (electronegativity, ionization energy) focus on exceptions (e.g., Cr, Cu) in past papers.
  • Chemical bonding (VSEPR, hybridization) prioritize sp³d² geometries for coordination complexes.
• Unit 3: Reaction Kinetics & Thermodynamics
  • Rate laws and order determination solve 1–2 problems on half-life (1st/2nd order) with given data.
  • Arrhenius equation memorize E_a calculations; past papers favor ln(k) vs. 1/T plots.
  • Gibbs free energy expect 1–2 questions on spontaneity (ΔG° = ΔH° TΔS°) with numerical values.
• Unit 4: Organic Reaction Mechanisms
  • SN1/SN2/E1/E2 mechanisms draw energy profiles for CH₃Br + OH^– (polar protic vs. aprotic solvents).
  • Carbocation stability rank tert, sec, primary via hyperconjugation (past papers test this yearly).
  • Stereochemistry predict products of E2 eliminations (Zaitsev’s rule) with R/S configurations.
• Unit 6: Coordination Chemistry
  • Isomerism (structural/geometric/optical) draw [Co(en)₃][Cr(CN)₆] isomers and label fac/mer.
  • Spectrochemical series predict Δ_o for [Fe(CN)₆]^4– vs. [Fe(H₂O)₆]²⁺.
  • Valency theories explain VBT vs. CFT for [Ni(CN)₄]^2– (square planar vs. tetrahedral).
• Unit 7: Molecular Spectroscopy
  • IR spectroscopy identify functional groups via ν(C=O) shifts (e.g., 1700 cm^–1 for ketones).
  • NMR splitting patterns calculate n+1 rule for CH₃CH₂OH protons.
  • UV-Vis relate λ_max to conjugation (e.g., benzene vs. naphthalene).

Exam Strategy

• Time Allocation:
  • 15 mins: Quickly solve 2–3 numericals (kinetics/thermodynamics) for easy marks.
  • 60 mins: Answer 4–5 short-answer questions (mechanisms, spectroscopy, bonding).
  • 60 mins: Tackle 1–2 long-answer questions (coordination chemistry or organic mechanisms).
  • 15 mins: Review calculations and spell-check.
• FAQs
  • Q: Are past-year papers sufficient for TEE prep?: A: Yes, but focus on high-weightage units (Units 3–4–6) where 60% of questions appear annually. Supplement with IGNOU study materials for theory gaps.
  • Q: How to score in numerical problems?: A: Practice unit conversions (e.g., atm torr) and logarithmic equations (Arrhenius plot). Use dimensional analysis to verify answers.