I started studying chemistry also along with Physics. I bought Tata McGrawhill JEE 2007 book sometime back. I read the first lesson and material relating to Gases in the second lesson. The authors should have recommended good books on the subject in their guide. The lessons given in the guide are too brief and one cannot understand anything by just reading that material. The guide may be useful to give practice in answering large number of questions. But it is absolutely inadequate for learning the subject or to attempt answering the questions given. I shall write to McGraw-Hill people about it.
I have fundamentals of Chemistry, by Fred Redmore, a book given to me by a colleague to refer now.