which is most scorinf topics in chemistry and maths

can i ignore heat and themodynamics in physics

heat is very easy & scoring topic in physics ,don't leave it
in maths -vector & 3d are most scoring topic,co ordinate geometry is also very scoring
in chemistry prefer organic over inorganic over physical
aldol is a major reaction mechanism which iit asks
inorganic has 5 main topics & each are of equal importance
 physical comes very less & every topic has max to max 2 question

 

 

 

 

 

 

 

 

 

 

may u help me in overcoming the fear of maths , especially in cordinate geometry and 3d........ plese suggest me the way to study and details about time i should give to one particular subject.............. have a hope wid u .................