Hey, 

Mechanics, Electricity and magnetism have 24%, 25% of the weightage respectively which means nearly half of the paper would be consisting of the questions from the mentioned chapters. Modern Physics, Waves and Optics carry 18%, 14%, 10% weightage respectively. Thermodynamics with 9% weightage. 

Caluclus, Geometry, Trigonometry carry 23%, 32%, 9% respectively. Arthematic has 33% of weightage. Algebra has the least weightage of 4%

Physical Chemistry, Organic Chemistry and Inorganic Chemistry are 21%, 22% and 57% respectively. 

Thank you :)