Introduction:
The JEE Main exam is a highly competitive examination that tests the knowledge and understanding of various subjects, including chemistry. While it is generally recommended to use pen and paper to solve the chemistry section, it is indeed possible to solve it without the use of these tools. In this response, we will explore some strategies for solving the chemistry section of the JEE Main exam without using a pen and paper.

Strategies for solving the chemistry section without using pen and paper:
1. Mental calculations: One of the most important skills for solving the chemistry section without pen and paper is the ability to perform mental calculations. Practice mental arithmetic, such as multiplication, division, and addition, to enhance your speed and accuracy in calculations.

2. Visualize concepts: Chemistry involves understanding and visualizing various concepts, such as chemical structures, reactions, and equations. Try to visualize these concepts in your mind to solve problems without the need for pen and paper. For example, when balancing chemical equations, you can mentally track the number of atoms on each side of the equation.

3. Use shortcuts and tricks: Learn and apply various shortcuts and tricks that can help you solve problems quickly. For instance, memorizing common conversion factors, such as Avogadro's number or the molar mass of common compounds, can save time during calculations.

4. Elimination method: When faced with multiple-choice questions, use the elimination method to narrow down the options. Mentally evaluate each option and eliminate those that are obviously incorrect. This technique can increase your chances of selecting the correct answer even without writing down the calculations.

5. Prioritize easy questions: Scan through the entire chemistry section and identify the questions that you find relatively easier to solve mentally. Start with these questions first to build confidence and save time for more challenging problems.

6. Practice: Regular practice is crucial to develop the skills required for solving the chemistry section without pen and paper. Solve a variety of practice questions and mock tests to improve your mental calculation speed and accuracy.

Conclusion:
While using pen and paper is generally recommended for solving the chemistry section of the JEE Main exam, it is possible to solve it without these tools by developing mental calculation skills, visualizing concepts, using shortcuts and tricks, employing the elimination method, prioritizing easier questions, and practicing regularly. Remember to stay calm and focused during the exam, and utilize the strategies mentioned above to maximize your chances of success. Good luck!