Yes, solving previous years' papers of UPSC Chemistry optional can help in improving the ability to analyze scientific literature and research papers. Here's how:

1. Enhances knowledge and understanding:
Solving previous years' papers exposes candidates to a wide range of topics and concepts in chemistry. By attempting and analyzing these questions, candidates can gain a deeper understanding of various scientific principles, theories, and their applications. This knowledge forms the foundation for analyzing scientific literature and research papers effectively.

2. Familiarity with research terminology:
UPSC Chemistry optional papers often contain questions that require the understanding of scientific terms and jargon. By regularly solving these papers, candidates become familiar with the terminology commonly used in scientific literature and research papers. This familiarity helps in comprehending and analyzing complex scientific texts more efficiently.

3. Development of critical thinking skills:
The process of solving previous years' papers involves critical thinking and problem-solving skills. Candidates need to analyze and interpret the given information, apply relevant concepts, and arrive at logical conclusions. These skills are crucial when analyzing scientific literature and research papers, as it requires evaluating the validity and reliability of the information presented.

4. Exposure to different types of questions:
UPSC Chemistry optional papers consist of a variety of question types, including multiple-choice, descriptive, and analytical questions. Solving these papers helps candidates develop their ability to comprehend and answer different types of questions. This skill is essential when analyzing scientific literature, as research papers often present information in various formats, such as graphs, tables, and equations.

5. Time management and exam strategy:
Solving previous years' papers helps candidates in developing effective time management skills and exam strategies. They learn to prioritize questions, allocate time appropriately, and identify the most efficient approach to solve a problem. These skills are transferable when analyzing scientific literature and research papers, as candidates need to efficiently navigate through the text and extract relevant information within a limited timeframe.

In conclusion, solving previous years' papers of UPSC Chemistry optional can significantly enhance the ability to analyze scientific literature and research papers. It improves knowledge, familiarity with terminology, critical thinking skills, exposure to different question types, and time management abilities. Regular practice of these papers is an effective way to prepare for the challenges faced while analyzing scientific literature and research papers.