i m preparing for my class 12th cbse board exams plz tell me which topics are important in phy and chem for numercals only..

mole comsept

You can do - nernst equation related questions,faraday's law based questions. Density related questions.Solution Molarity,molality,mole fraction,colligative properties based questions Chem kinetics- First order rate equation based ,Activation energy based if you want I can send you important papers.