NIOS chemistry (313) TMA2025-26 – The truth no one will tell you
You may not realise your mistake until the results day, as the Chemistry TMA carries 20% weight that NIOS quietly includes in your final result.
We recommend avoiding any unnecessary risks.
The Full Solved Chemistry (313) TMA2025-26 is here, along with the mistakes to avoid and the real-time deadlines. Also included are the strategies that will actually help you score higher.
This blog includes the following:
- TMA Weight
- Bifurcation of the syllabus (TMA + Public Exam)
- Last date
- Writing guidelines
- Download the link
- Complete NIOS Chemistry TMA Solutions
- Chapter-wise lesson mapping
Quick Summary
NIOS Chemistry (313) TMA for the 2025-26 exam carries 20 %. It must be submitted before 31st January, 2025 or before 31st July, 2025. The questions must be answered in 40-60 words. Here is the complete solution for Chemistry TMA 2025 – 26, including the syllabus, weightage rules, and submission guidelines.
NIOS Chemical (313) Marking weightage
| Column 1 | Column 2 |
|---|---|
| TMA (Tutor Marked Assignment) | 20% |
| Public Exam | 80% |
NIOS Chemistry (313) TMA2025-26 Important Dates
| Column 1 | Column 2 | Column 3 |
|---|---|---|
| April/May 2025 | 31 Jan 2025 | 15 February 2025 |
| Oct/Nov 2025 | 31 Jul 2025 | 15 August 2025 |
Your TMA will not be accepted if submitted after the final deadline: either 31st January, 2025 or 31st July, 2025, depending on your session. The No. 1 mistake that I see students make and regret is missing this cut-off.
WHY THIS TMA MATTERS ?
1. TMA = 20% your final Chemistry marks
You can tell if you passed with 70+ or 50+ marks by comparing your scores. Aim to just survive.
2. NIOS DOES NOT TELL YOU HOW MUCH TMA AFFECTS YOUR FINAL SCORE
Your mark sheet will reflect it silently.
3. This year, the checking is stricter
The reason is that thousands of students copied from the last year.
4. Your final percentage will increase instantly with a well-written TMA
Students who scored 35 in theory still passed with TMA support.
Your TMA should not be written randomly. It should be smart, clean, and exam-oriented.
NIOS Chemistry (313) – Full Syllabus (2025-26)
(Official NIOS module distribution)
| Column 1 | Column 2 | Column 3 |
|---|---|---|
| Module 1 Basic Concepts | – | Lesson 1 |
| Module 2 Atomic Structure | Lesson 3 | Lesson 2, 4 |
| Module 3 – States of Matter | Lessons 5, 6, 8 | Lesson 7 |
| Module IV – Chemical Energetics | Lesson 10 | Lesson 9 |
| Module 5 – Chemical Dynamics | Lessons 11, 14, 15 | Lessons 12, 13 |
| Module VI: Chemistry of Elements | Lessons 16, 19 | Lessons 17, 18, 20, 21, 22 |
| Module 7 – Organic Chemistry | – | Lessons 23-29 |
| Module VIII- Chemistry in Everyday Life | Lessons 30, 32 | Lesson 31 |
This table shows where questions come from and why many students get confused.
What students do WRONG and realise too late
Mistake #1: Write long stories instead of 40-60 word responses
NIOS does not reward long answers.
Mistake #2: Copying from the Internet
The catch is that they do.
They deduct marks.
This is a straightforward rule.
Mistake #3: Bad handwriting = Lost marks
Teachers are human beings.
If your writing is unclear, teachers will not mark it well.
Mistake #4: Overusing diagrams
Use diagrams only when needed.
Mistake #5: Write without understanding
It leads to contradictions and is easily spotted.
Mistake #6: Failure to submit on time
Being late can cost you 20% of your grade.
🧪 Now — What You NEED to Do (Exact Checklist)
- is the answer.
- Highlight scientific terms
- Use clear, exam-style English.
- Draw diagrams only if needed.
- Please follow my solution format (below).
- Only handwritten notes are acceptable.
- Keep margins and spacing neat.
- Use only black or blue pens.
- Use only printed sheets.
- Submit before the deadline—no exceptions.
🧪 SOLVED CHEMISTRY (313) TMA 2025–26
SECTION ONE – Answer ANY ONE of the following questions (40-60 words)
Q1(a) Classify the elements of Groups 14, 15 and 16 into metals, non-metals and metalloids.
Answer (40-60 words)
Group 14 consists of carbon, silicon, germanium (metalloids), and tin and lead (metals).
Group 15 includes bismuth, arsenic, and antimony, as well as nitrogen (non-metals).
Group 16 includes oxygen, sulfur, selenium (a non-metal), tellurium (a metalloid), and polonium (a metal). Each group becomes more metallic.
Q1(b) Compare the metallic character of aluminium and potassium.
Answer (40-60 words)
Potassium is an alkali metal that readily loses its electrons and exhibits strong metallic behaviour. Aluminium is less metallic because it has a higher ionisation energy, a smaller size, and a greater tendency to form covalent compounds. Potassium has a high electropositive value, while aluminium is amphoteric and shows weaker metallic properties.
FAQs
1. Does Chemistry TMA have to be mandatory?
Yes. Missing TMA marks lowers your score.
2. What is the TMA Weightage?
Chemistry marks are 20%.
3. What is the word limit for the answer?
40-60 words.
4. Can I copy guidebooks?
No. NIOS subtracts marks for repeated mistakes.
5. Where can I find a TMA solution?
UnnatiEducationals.com/nios (free PDFs).
6. Handwriting is important.
Clarity = more marks.
7. Downloadable Chemistry TMA solutions
Yes, free solutions are available on UnnatiEducationals.com/nios.
8. What is the passing rule for cars?
Theoretically + TMA together, 33%.
