Hey YAMAN.

We cant say which Subject is difficult in jee mains 2018 .Equal weightage is given to Physics ,Chemistry and maths. The syllabus of each of these 3 subject is divided into appropriate number of units and thus equal number of questions have been chosen from each unit. Also, every subject of each question paper set of JEE Main carries the same percentage of easy, medium and difficult questions. Thus, each question paper set has equal difficulty level.

Thanks .ALL D BEST