Yes obviously u can prepare for JEE in 2 months all u need is perseverance,hard work, patience and will power. If your basics are little clear, just focus on ncert for chemistry . A day consist of 24 hours 5 hours for sleep and 2 hours for all sort of odd jobs then you are left with 17 hours, out of this 17 hours devote 6–6 hours for physics and maths and 5 hours for chemistry. By devoting this much time u can atleast fetch a fighting score .