Hello Rini,

You can refer to the following books for the preparation of CSIR NET Chemical Sciences entrance examination:

• CSIR-UGC NET Chemical Sciences (Part A, B & C) by R. Gupta's
• Joint CSIR-UGC NET (Chemistry Science) by Narender Sharma
• CSIR-UGC NET/JRF/SET Chemical Sciences by  (For Paper-I & II ) Dr. Hemant Kulshrestha & Dr. Ajay Taneja
• A Logical Approach in Chemistry for CSIR/NET/JRF And GATE (Problems And Their Solutions) by  by Jagdamba Singh,Ashutosh Singh,Jaya Singh
• Trueman's UGC-CSIR JRF / NET Chemical Sciences (Chemistry) (2012 Edition) by B. Roy, M. Gagan

All the best!