Following books may help you while preparing:

• Gaseous state, Thermodynamics, Phase rule, solutions, Colligative properties, Electro Chemistry, Catalysis, Colloids - Principals of physical chemistry - Puri, Sharma & Pathawa
• Chemical kinetics - Advance physical chemistry - Gurdeep Raj
• Photo chemistry - A text book of physical chemistry (Vol. - IV) - K.L. Kapoor
• Advance physical chemistry - Gurdeep Raj.

• Bonding and shape of organic molecules, Stereo chemistry of carbon compound - Reactions and reagents - O.P. Agarwal
• A guide to mechanism in organic chemistry - Peter Sykes
• Rest all the chapters - A text book of organic chemistry - Bahl & Bahl

• Atomic Structure - Principle of physical chemistry - Puri, Sharma & Pathwa
• Advance inorganic chemistry - J.D. Lee Chemical Periodicity, Chemical bonding,Coordination compound - Selected topics in inorganic chemistry - Maden, Malik, Tuli
• Theoretical principles of inorganic chemistry - G.S. Manku,
• Extradiction of metals, Principle of inorganic chemistry - Puri, Sharma, Jauhar.
• Rest all the chapters - An advance inorganic chemistry - J.D. Lee
• Pollution and its control - A text book of environmental chemistry and pollution - S.S. Dara.

The student is required to keep the following things in mind:

• Your approach has to be simple, standard and to the point;
• You require to practice the numerical problems rigorously and you must have a clear knowledge of reaction mechanisms, as the questions are increasingly being asked straight and factual.
  
• In Pericyclic Reaction section, a greater emphasis has to be on diagrams rather than on theoretical explanation and practice name reactions thoroughly from standard sources.
• The orientation of orbitals and molecular orbital diagrams are necessary.
  
• In re-agent section also, your approach has to be completely factual

Hope this helps
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