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The Tamil Nadu 12th Chemistry exam will be held on March 21, 2026 (tentative). The board will release the Tamil Nadu 12th Chemistry Answer Key 2026 once the exam is over. The answer key for the Chemistry exam will consist of correct answers to the questions asked in the exam.
Students can use the answer keys to calculate their expected score in the exam. The board will release the Tamil Nadu 12th Chemistry Answer Key 2026 a few days later. Meanwhile, we will update the unofficial keys here for Tamil Nadu 12th Chemistry that students can refer to.
Once available, we will update the link below to download the Tamil Nadu 12th Chemistry answer key 2026 and question paper:
| Tamil Nadu 12th Chemistry Answer Key 2026 (To be updated) | Tamil Nadu 12th Chemistry Question Paper 2026 (To be updated) |
Also, Check for All Subjects: TN 12th Public Answer Key 2026
The TN 12th Chemistry public answer key 2026 will be based on four parts, and students can understand the pattern by referring to the table below.
| Sections | Number of Questions | Marks | Type of Questions | Difficulty Level |
| Part I | 15 | 1 x 15 | Multiple Choice Questions | Moderate |
| Part II | 7 | 2 x 7 | Very Short Answer Questions | Moderate |
| Part III | 7 | 3 x 7 | Short Answer Questions | Moderate |
| Part IV | 6 | 4 x 6 | Long Answer Questions | Moderate |
| Total | 35 | 70 | - | - |
The board will release the TN 12th Public Chemistry 2026 answer key in April 2026 (tentative). Therefore, after downloading the Chemistry answer key, students can follow the steps below.
Some steps students must follow after the TN 12th Chemistry answer key are mentioned below.

Read more: Tamil Nadu Class 12 Result 2026
The TN 12th Chemistry answer key 2023 helped the candidates estimate their final marks. Students must refer to the previous year's answer keys to understand the answer pattern and marking scheme.

To download the detailed TN 12th Public exam Chemistry answer key, students can refer to the link below.
| Particulars | PDF Link |
| TN 12th Public Exam Chemistry Answer Key | Download Now |
The board conducted the TN 12th Chemistry paper in April 2023 in pen and paper mode. The Chemistry paper contained questions worth 70 marks, and students were given 3 hours to answer the question paper.
| Chemistry Exam Paper Analysis | Chemistry Paper Analysis 2023 |
| Level of Difficulty | Moderate to Tough |
| Types of Questions | TN 12th Syllabus & Sample Paper-Based Questions |
| Duration & Length of the Exam | Moderate Level |
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