you can complete the organic chemistry by revising all the important reaction involved also revise the nomenclature. 

Thermodynamics is a common chapter for chemistry and physics which is very important regarding the jee mains examination too. this is applicable to nuclear physics and nuclear chemistry too.

physical chemistry questions are also important regarding numerical exams electrochemical reactions are also important for scoring.

coming to mathematics 

try solve integration and differentiation questions by using the options you can do so by solving mock papers and previous year questions as much as possible.

in algebra, most of the questions are from property based and you can solve it by having deep insight.

in quadratics equations, most of the questions are based on the alpha-beta or say sum or product of the equations. 

try to remember the important formulas of the 3d geometry and 2d geometry which is very important for last time revision.

all the best !!!