Hello,

In jee mains there are total 75 questions ( 25 - maths , 25 - chemistry , 25 - physics )

out of the 25 questions in each section 20 multiple choice questions which contains negative marks also if you give wrong answer then the rest 5 question is integer type question where we will have to type ans it does not have negative marks so total marks is 300

Some topics in Jee mains which has got great number of questions are

Maths - calculus ( both deferential calculus and integral calculus  )

chemisty  - organic , s block , p block , and d block , electrochemisty , equilibrium ( invluding ionic equilibrium )

Phyicis - ( electricity , magnetism , optics ,mechanics ( newtons Laws , pulley system ) , elasticity , fulid dynamics

Hope this helps you ,

best wishes for your future