Hello aspirant,

(1) IISER test will comprise of PCMB.

(2) total of 15 questions will be there is each subject. So total number of questions will be 60

(3) 3 marks will be awarded for every right answer and 1 mark will be deducted for every wrong             answer.

(4) To get detailed information about chapter distribution in each subject, please refer this                    link https://engineering.aglasem.com/iiser-aptitude-test-2019-syllabus/

(5) First of all the best study material is NCERT. clear NCERT and have your notes ready with you           and remember it. After this solve as many sample papers as you can so as to ensure whether you       have thorough understanding of topics or not.

You can find model questions from the link https://www.quora.com/Where-can-I-find-previous-year-papers-with-solutions-for-the-IISER-Aptitude-Test

Hope your query is resolved. I wish you best of luck in your future endeavor.