Hi,

Yes, you are pass in your chemistry examination as passing marks in theory are 23 marks . 'XXXX' stand for improvement in CBSE results. It means that you must have applied it under the improvement examination section. If a student has 6 subjects, and he got reappear in one of the subject, he is considered as overall pass but he/she can appear for that leftover examination under the improvement category. So you have no need to worry about it, you are pass in your chemistry examination.