I m in 12th. i have S.L arora 11th class ,Modern abc(chemistry) 11th ,12th pradeep (chem.+ physics Both) ,RD shrma 11th ,RS aggarwal 12th, M.T.G ( Physics and maths) AND Arihant UPSEE last year papers.... So qns is that Should i purchase any other book for competitive exam like Hcverma OPtondan?

Hello aspirant I am here for helping you.
If you want to go with competitive examination then here NCERT are sufficient books for having content.
But problem is that the entire content in NCERT written in the form of paragraph which sometime difficult to read so here your mentioned books can help you to have maximum knowledge in minimum time.
But it is not necessary that from these books you can crack competitive examination because main concern for the competitive examination is that from where you will get the questions which will be asked in the exam so HC Verma and op tandon these are some of the book from where you can have some competitive level questions.
If you will go with the coaching or you are pursuing then you should go with the coaching study material and after completion of the entire syllabus if you have time then you should go with these books for extra knowledge.
this was all about some high level competitive exams but if talking about UPSEE then you don't need to bother because NCERT and your above reference books are sufficient for having good marks in UPSEE exam.
I hope you got it.
Feel free to ask any query in comment section.
Best of luck.