Hi, There are 2 papers under KEAM. Paper 1 includes Physics and Chemistry and Paper 2 has Maths under it.  There are 120 questions under borh paper sections.

You can check the complete KEAM exam pattern here: http://www.engineering.careers360.com/articles/keam-exam-pattern

Also some of the important topics for MATHS are:

• SETS
• Bionomial
• Combinations
• Quadtratic equations

PHYSICS:

• Laws of Motion
• Work
• Oscillations
• Electromagnetic Waves
• Electromagnetic Induction and Alternating Current
• Optics

Consider the Algebra section as well.

Hope this helps.

All the best.