Study Chemistry systematically. First complete Organic Chemistry and then move to Physical Chemistry and then move to Inorganic Chemistry. Focus on topics like Solutions, Electrochemistry, Chemical Kinetics, Block Elements, Aldehyders, ketones and carboxylic acids. Memorise name reactions. Practise numericals and direct formulae. Also study topics like solutions, chemical kinetics and surface chemistry. Understand the topics, revise all the topics more than once. Stick to NCERT and practise as many as previous question papers you can along with model test papers.

hi,

see if you are a 10+2 grade student, chemistry is really important for is for the prospect of board exam as well as competitive exams, exams like jee main, icar, kvpy, neet all of the entrance exam has separate papers for chemistry. now first of all you need to study from a good text books,

some of the good text books for 10+2 is , ncert chemistry,

chemistry by ks verma.

A Collection of Fully Solved Questions asked- Examination by Purnima Sharma.