Hello Tushar,

Here are some popular books for Class 12 board practicals, covering experiments and viva questions for Physics, Chemistry, and Computer Science :

Physics Practical Books:

1. Laxmi Publications Practical Physics Class 12
2. CBSE Laboratory Manual Physics Class 12 by Together With
3. All-in-One Physics CBSE Practical by Arihant Experts
   
   Chemistry Practical Books:
   
   
4. Practical Chemistry Class 12 by Laxmi Publications
5. Laboratory Manual Chemistry Class 12 by Together With
6. CBSE All-in-One Chemistry Practical by Arihant
   
   Computer Science Practical Books:
   
   
7. CBSE Computer Science with Python Class 12 by Sumita Arora
8. Computer Science Practical Manual by Oswal Publishers
9. Practical Notebook with Viva Questions for CS by Dhanpat Rai & Co.
   
   Where to Find:

• Amazon and Flipkart have most of these books available for purchase.
• School/Local bookstores often stock the latest editions.
• For free PDFs or resources , refer to NCERT websites or educational forums like myCBSEguide or CBSE official site for practical manuals.

Make sure to confirm with your teacher regarding any specific book recommendations used by your school.

I hope this answer helps you. If you have more queries then feel free to share your questions with us we will be happy to assist you.

Thank you and wishing you all the best for your bright future.