you are prepearing for IIT JEE,so come out from the comfort zone.and make yourself a hard working student.
only way to remove your confusion to give more time on that perticular subject.and this can be achieved by hard work only
follow good books for Inorganic chemistry.
Such as J d lee & O P tandon.
If you are not taking coaching then I will suggest you to join Coaching Classes,they will guide you in better way.
Hope you will give your best.