TN Plus Two Chemistry Answer Key 2025: The Tamil Nadu Board of Secondary Education, Chennai, held the TN Class 12 Chemistry 2025 examination today, March 21, 2025. The exam was held from 10 AM to 1:15 PM. The Tamil Nadu Class 12 Chemistry 2025 question paper had a weightage of 70 marks. Students must score a minimum of 15 marks out of 70 marks. Students can check the TN Plus Two Chemistry Answer Key 2025 available here with the TN Plus Two Chemistry exam analysis 2025.
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TN Plus Two Chemistry Answer Key 2025
Check the Tamil Nadu Chemistry 2025 unofficial answer key from the table below.
| Questions | TN Plus Two Chemistry Answer Key 2025 |
| 1. During the decomposition.... | c) 3.0 mol min-1 |
| 2. How many moles of I2 are... | a) 3 |
| 3. Non-stick cookwears... | c) 1,1,2,2-tetrafluoroethane |
| 4. The compound that reacts with.... | a) N-methylaniline |
| 5. Boric acid is an... | c) accepts OH- from water, releasing protons |
| 6. In an electric field... | a) iii>ii>i>iv |
| 7. Assertion A Reason R | c) both are false |
| 8. In calcium fluoride | a) 8 and 4 |
| 9. The secondary structure... | c) alpha helical backbone |
| 10. At 25 degree.... | c) 2.71X10-14 |
| 11. what is the oxidation... | b) +2 |
| 12. The number of electrons that have.... | a) 6.022 X 10^22 |
| 13. strongest acid... | a) 4-nitrophenol |
| 14. CH3Br.... | c) acetylchloride |
| 15. Extraction od gold and silver involve... | a) displacement with zinc |
TN Plus Two Chemistry Exam Analysis 2025
The TN Plus Two Chemistry Question Paper Analysis 2025 is given in the table below.
| Particulars | TN Plus Two Chemistry Exam Analysis 2025 |
| Overall Exam Difficulty Level | Moderate to Difficult |
| Part I Difficulty Level | Moderate |
| Part II Difficulty Level | Moderate to Difficult |
| Part III Difficulty Level | Moderate |
| Part IV Difficulty Level | Moderate to Difficult |
| Number of Good Attempts | 55+ |
| Was the Paper Lengthy and Time Consuming? | Part IV was a bit lengthy. |
Overall, a student must score 35 marks out of 100 to pass the TN 12th Chemistry Examination 2025. Students are advised to use the TN Plus Two Chemistry Exam Analysis 2025 and the TN Plus Two Chemistry Answer Key 2025 only for personal reference. Visit the official website of the Tamil Nadu Board of Secondary Education for more updates.