Hii himanshu!

Hope you are doing well, if you are searching for SOSE previous question papers, I am mentioning few reliable sources where you can check them:

1. Official EDUDEL portal - you can find model papers and blueprints for different stream such as humanity and STEM. They also show the format of paper the number of questions type of questions and the marking scheme also.
2. Scribd- many students and coaching centre share practice sets and mock test which are like the real exam in format and difficulty level.
3. Youtube- many educators upload video solutions of past SOSE papers breaking down each question step by step which will help you in understanding both the content and approach.

You can also check the question paper directly by clicking on the given link: SOSE pyq (https://www.edudel.nic.in/edu/SampleQuestionPapers.html) .

Thankyou !