Dear Aspirant,
Here are the few best books for preparing IITJAM CHEMISTRY
*Quantitative Analysis R.A. Day Jr. A.L. Underwood
*Elementary organic spectroscopy : principles and *chemical applications by Sharma Y.R
*Instrumental approach to Chemical analysis by AK Srivastava, PC Jain
*Analytical chemistry :An introduction by D.A. Skoog, D.M. West and F.J. Holler, S.R. Crouch
*Modern Experimental organic chemistry by R.M. Roberts, J.C. Gilbert, L.B. Rodewald, A.S. Wingrove
*Physical chemistry by Keith J. Laidler, John H. Meiser
*Textbook of physical chemistry by Maron
Physical chemistry by Levine
*Essentials of nuclear chemistry by H. J Arnikar
*Physical chemistry : A molecular approach by D. A. McQuarrie and J. D. Simon
*Principles of physical chemistry by B. R. Puri, L. R. Sharma, and M. S. Pathania
*University general chemistry by CNR Rao
*Chemistry of organic natural products  by O. P. Agarwal
*Concepts and models of inorganic chemistry by Bodie Douglas, Darl Mcdaniel, John Alexander
*Organic chemistry structure and reactivity by Seyhan N. Ege
*Organic chemistry by Paula Y. Bruice

Hope this helps.

Good luck!