Hello pawan ,

There is no such exam fot you to give in your +1 for b.tech admission. You need to go for your +2 and then you will become eligible to give exam like  jee main or advance , state level entrance exam for b.tech,BITS and so on.

On the other hand you can go for some competitive exam like olmypiads held every year that will help in improving your basics.

So be chill and focus on your board and you can go for your preparation for exam like jee if you want to go.

Hope it helps.

Thank you :)