NCERT, . Chemistry : model questions and answers hons and P.G. / NCERT and SCERT. - 13th ed / . - Kolkata : B M Publication , 2012. - Verious pagination : ill.,fig.,pic.,map ; 21cm . NULL ISBN: RS170.00 (pbk) Subjects--Index Terms: CHEMISTRY-GUIDE BOOK Dewey Class. No.: 540.76 / NCE/C