Hello Saurabh

Yes, you can give improvement exam in ony 2 subjects.

You can give improvement exam for only 1 subjects or for all the 5 subjects.

The question papers of improvement exam is same as regular students. the students giving improvement exam will be given same question papers as regular board exam students. There is no bias between regularly CBSE paper and Improvement paper.

Hope it helps you.

This was done earlier but as of now it is now done ina. Manner where you need to give the exams of the entire subject in order to get them cleared. So be patepat and so you need to apply to the same in order to be elligible enough in the jee main.

Good luck!

Yes, surely you can! 

Remember, you will be eligible for improvement exam only if you take a drop year. 

Take the exams jn the subjects you are sure of scoring well. All the best!