You must be passed in each and every subject of your group(PCM) with at least 45% in Aggregate in all five subjects to get admission to engineering even in private engineering colleges. So if you are failing in any of the subjects of your group, you can't get into engineering.

Yes bhavin,
it is possible as you can apply for improvement and next year you can appear for the board examination again..you will not be allowed to attend the classes but you can appear for the main examination. For more information contact your school.
Thank you

Hi bhavin,
Please be a bit more explanatory about your question.
Thanks