There are two papers in the IAS (UPSC CSE) Main Exam, and the chemistry optional is a scoring option. The syllabus is suitable for those who have graduated in Chemistry. Each paper is for 250 marks and has to attempted in 3 hours.
The UPSC Chemistry syllabus covers fundamental chemistry topics, hence candidates must understand the fundamental concepts. The atomic structure, states of matter, and various types of reactions are just a few of the topics covered in the Chemistry optional syllabus.