NSEC / IChO
National Standard Examination in Chemistry → International Chemistry Olympiad
Olympiad
7 Info Sections
Overview
Overview
The Chemistry Olympiad pathway in India is a prestigious 5-stage journey that can lead to representing India at the International Chemistry Olympiad (IChO).
Selection Stages
| Stage | Exam | Details |
|---|---|---|
| 1 | NSEC | National Standard Examination in Chemistry |
| 2 | INChO | Indian National Chemistry Olympiad |
| 3 | OCSC | Orientation cum Selection Camp at HBCSE |
| 4 | PDC | Pre-Departure Camp (8–10 days at HBCSE) |
| 5 | IChO | International Chemistry Olympiad |
Stage 1 — NSEC
Stages / Rounds
National Standard Examination in Chemistry (NSEC)
| Parameter | Details |
|---|---|
| Eligible Class | XI & XII (subject to age criteria) |
| Organizing Body | Indian Association of Physics Teachers (IAPT) |
| Age | Date of Birth between July 1, 2004 – June 30, 2009 |
| Selections | Approx. 300–500 for INChO |
| Fee | ₹200 per student |
| Exam Month | November (usually 3rd Sunday) |
Exam Format
| Section I | Section II | |
|---|---|---|
| Question Type | Single Option Correct | More than one Option Correct |
| Total Questions | 48 | 12 |
| Marking | +3, −1 | No Negative Marking |
| Marks | 144 | 72 |
Total: 60 Questions | 216 Marks | 2 Hours
Stage 2 — INChO
Stages / Rounds
Indian National Chemistry Olympiad (INChO)
| Parameter | Details |
|---|---|
| Governing Body | Indian Association of Chemistry Teachers (IACT) |
| Number of Examinees | Approx. 300–500 |
| Selections (for OCSC) | Approx. 30–35 |
| Duration | 3 Hours |
| Exam Month | February (first week) |
NSEC Cut-off & Analysis
Cut-off & Marks
NSEC 2022 Cut-off Scores
| Metric | Score |
|---|---|
| MI Score | 148 |
| MAS Score | 93 |
| Avg. of Top 10 | 186.1 |
Chapter-wise Weightage (NSEC 2022)
| Chapter (Class 11) | Weightage |
|---|---|
| Equilibrium | 8.33% |
| Thermodynamics | 8.33% |
| Organic Chemistry Basics | 5.00% |
| Some Basic Concepts | 5.00% |
| Hydrocarbons | 3.33% |
| P-Block Elements | 3.33% |
| Chapter (Class 12) | Weightage |
|---|---|
| Aldehydes, Ketones & Carboxylic Acids | 11.67% |
| Coordination Compounds | 8.33% |
| Amines | 6.67% |
| Electrochemistry | 5.00% |
| Haloalkanes & Haloarenes | 5.00% |
Official Links
Resources
- HBCSE Science Olympiads — Official portal for all science olympiads
- IAPT — Stage 1 organizing body
Stages 3–5: OCSC → PDC → International
Stages / Rounds
Stage 3 — Orientation cum Selection Camp (OCSC)
- Top 30–35 students from the Indian National Olympiad are invited
- Held at HBCSE (Homi Bhabha Centre for Science Education), Mumbai
- Orientation for Olympiad-level theoretical, experimental, and observational tasks
- Several selection tests held during the camp
- 4–6 students selected to represent India
Stage 4 — Pre-Departure Camp (PDC)
- Selected team undergoes 8–10 days of rigorous training at HBCSE
- Advanced problem-solving, experimental techniques, and mock competitions
Stage 5 — International Olympiad
- 4–6 students accompanied by 4 teachers/mentors
- Competition includes theory and practical/experimental rounds
- Gold, Silver, Bronze medals and Honourable Mentions awarded
- India has won several Gold and Silver medals across all 4 Olympiad subjects
NSEC to INChO Path and Recent MAS/MI Trend
Stages / Rounds
NSEC shortlisting uses MAS and MI thresholds published each year. Recent values change year to year; always use latest IAPT cut-off PDF.
- NSEC: objective screening for chemistry olympiad pipeline
- INChO: descriptive theory format with deeper conceptual demands