Cracking IIT JAM Chemistry isnt as difficult and you need more practice, a proper test taking strategy, a good test series and a strong hold on Full Syllabus of JAM Chemistry as well as you B.Sc. Component (If B.Sc Chemistry Student). There are lots of Material avaiable in Market as well as Online Test Series and Coachings/Tutorial Sessions on Platforms like Unacademy, MadChem as well as Youtube.

For more information about IIT JAM Chemistry Preparation do follow the link below

https://university.careers360.com/articles/how-prepare-jam-chemistry/amp