Are you going to write the tenth standard exams this year then please accept by best wishes for your exams. It is very nice of you to prepare before hand so that you would not have to worry later on. It is a very nice idea to check out the previous years question papers or the example of the type of question paper you are likely to get in your actual exams because it would give you an idea of how it would be and then it would not seem so intimidating on the day of the exam.

You can get the practice papers for the tenth Standard CBSE exams but not the actual question papers itself. There are several sites that you can refer to get the model question papers but the most reliable and credible one is cbse.nic.in/a>. You can also get several books that would give you a compilation of last several years exam papers and also some model question papers for practice.

 visit the site:

www.cbse.nc.in

Under the sub heading
Other News @ CBSE, you will find the point

Exemplary multiple-choice questions for assessment of Practical Skills in Science and Technology - Class X

You wont get it anywhere else.

 You would get a variety from www.avteschool.com