Yes, it is beneficial to attempt history optional mock tests in a quiet environment to simulate exam conditions. Here are the reasons:

1. Focus and Concentration:
- A quiet environment allows you to concentrate and focus solely on the mock test without any distractions.
- It helps in recreating the exam-like atmosphere, where you need to concentrate for a prolonged period.

2. Enhances Time Management:
- Attempting mock tests in a quiet environment helps in developing time management skills.
- You can practice allocating time to different sections and questions, just like you would in the actual exam.
- It allows you to gauge how much time you spend on each question and identify areas where you need to improve your speed.

3. Reduces Stress and Anxiety:
- A quiet environment helps in reducing stress and anxiety levels during the mock test.
- It creates a calm and relaxed atmosphere, similar to the exam hall, where you can perform at your best.

4. Mimics Real Exam Conditions:
- By attempting mock tests in a quiet environment, you can replicate the conditions of the actual exam.
- This helps in familiarizing yourself with the pressure, time constraints, and overall environment of the exam hall.

5. Improves Performance:
- Practicing in a quiet environment enhances your ability to stay focused and maintain concentration throughout the test.
- It increases your chances of performing well and getting accurate results in the mock test.

Conclusion:
Attempting history optional mock tests in a quiet environment is highly recommended to simulate exam conditions effectively. It aids in improving focus, concentration, time management, reducing stress, and replicating the real exam scenario. By practicing in such an environment, you can maximize your performance and achieve better results.