HEllo,

The best books for CHEMISTRY ARE:

• Modern Approach to Chemical Calculations by R.C. Mukherjee: For practice of solving Physical Chemistry Numericals
• Organic Chemistry by O P Tandon: Good explanation of topics
• Concept of Physical Chemistry by P Bahadur: Good explanation and set of quality problems
• Concise Inorganic Chemistry by J D Lee: Good reference book on Inorganic Chemistry

And the best books for MATHEMATICS are:

• Objective Mathematics by R D Sharma: Basics of every topic
• Plane Trigonometry by S L Loney: Trigonometry
• he Elements Of Coordinate Geometry by S L Loney:Coordinate Geometry
• Algebra by Dr S K Goyal Arihant Publications: Algebra
• Play with Graphs by Amit M Agarwal (Arihant Publications): For solving problems
• Differential Calculus by Amit M Agarwal (Arihant Publications): Calculus
• Integral Calculus by Amit M Agarwal (Arihant Publications): Calculus
• Complete mathematics for JEE Main TMH: For explanation of topics

GOod Luck