Yes,You will be getting admission in B.arch college , if you write the B.arch exam which is conducted on the day of JEE mains exam i.e Paper-I , where it is conducted in the forenoon and B.arch i.e. Paper-II, where it is conducted in the afternoon.You can also write NATA(National Aptitude Test in Architecture) to get admissimison in any architecture college around India.

https://engineering.careers360.com/articles/jee-main-cutoff-for-b-arch-b-planning from the above link checkout the cutoff for the B.arch examination.

B.arch paper will be consisting of Objective type of questions and also drawing questions.Duration for exam will be 3 hours . Paper consists of 82 questions.Part-I & part-II will be Mathematics & Aptitude tests which are objective type of questions carrying equal weightage of 4 marks each,negative marking i.e. 1/4th marks for every incorrect answer. Part-III will be drawing based test which carries total of 70 marks, here marks will be based on your drawing skills.

Mathematics :                                                                                                                               No.of Questions-30                                                                                                                       Total marks-120

Aptitude test :                                                                                                                               No.of Questions-50                                                                                                                     Total marks-200

Drawing test :                                                                                                                               No.of Quesrions-2                                                                                                                         Total marks-70

B.arch Paper will be carrying the total marks of -360

I'm hoping this answer had helped you. Feel free to ask if you have any queries.All the Best..!!

Thankyou.