one year is more than enough for chem ....O.P.TONDON or R.C.MUKHERJEE for physicaL chemistry ....O.P.TONDON for inrganic and ARIHANT for organic ......for aieee ncert book is more than enough for organic and inorganic.....chem is most scoring subject in any exam ....but regular revision is required to memorise it .......u should have to  good command on  periodicity  . chemical bonding for inorganic .....and on  reaction mechenism for organic chem...