Hii Vivek!
You haven't mentioned the name of the board of education you are studying in and the stream of subjects you have opted for. But, let me tell you that, in order to get the model papers or sample question papers depending on the exam pattern you can refer the respective official website of the education board and get it because most of the boards provide them online. To get the answers, you may refer to certain reference books and books containing solved question papers and sample papers. You may even take the help of your teachers and will learn more in this way. Hope you understand.
Good luck!