CSIR-NET Chemical Sciences draws roughly evenly from Organic, Inorganic and Physical Chemistry, plus interdisciplinary and general-aptitude questions. Exact topic weightage shifts year to year, so treat the figures below as trends to plan around, not guarantees — always confirm against the current official syllabus.
How the marks are split
Across Parts A, B and C, the three core subjects are balanced fairly equally, with Part C (application-heavy) usually deciding ranks. Part A (general aptitude) is exam-agnostic but a reliable source of marks.
High-yield topics by subject (observed)
Organic
- Reaction mechanisms & named reactions
- Stereochemistry & conformational analysis
- Pericyclic reactions; aromaticity
- Spectroscopy (NMR, IR, MS) for structure determination
Inorganic
- Coordination chemistry (CFT, isomerism, spectra, magnetism)
- Main-group & periodic trends
- Organometallics & catalysis; bioinorganic basics
Physical
- Quantum chemistry & group theory
- Thermodynamics & statistical thermodynamics
- Chemical kinetics; electrochemistry; spectroscopy
How to use weightage to plan
Prioritise topics that are both high-frequency and improvable for you. Don’t abandon a whole subject to chase another — because the three are balanced, weakness in one caps your rank. Use weightage to decide depth, not to skip.
Practise the way the exam tests you
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