GENERAL TOPICS IN PHYSICAL CHEMISTRY

     The syllabus in physical chemistry starts with this topic. The
     following are few of the important points in general physical
     chemistry.

     
       Dalton's atomic theory:
    
     1. Matter consists of indivisible atoms.
     2. All atoms of a given element have identical properties.
     3. Compounds are formed when atoms of different elements
         combine in a fixed ratio.
     4. Chemical reactions involve reorganization of atoms. 
     5. Atoms are neither created nor destroyed.

   
      Mole concept: 

     1. In any question always check if a reactant is a limiting
         reagent.

     2. No of molecules = No of moles* Avogadro No.
         No of atoms= molecularity* no of molecules.


     Balancing Redox Reactions:

     By jee advanced, all of you will be thorough with this topic. 
     
     Oxidation Number:

     1. It represents real charge in case of ionic compounds but
         imaginary charge in covalent compounds.
     2. Metals can have negative oxidation number in metal 
         carbonyls like [Ni(CO)4]-

     3. In SCN-  oxidation state of carbon is +4 sulfur is -2 and
         nitrogen is -3.

     4. In salts n factor is the total positive charge or
         the total negative charge.


    There is nothing much to revise in general physical chemistry.
    During the course of your preparation, you will definitely come
    across questions based on oleum, back titrations and double
    titrations etc. These topics have not appeared in iit jee for
    a long time. However, during iit preparation, do practice a 
    few questions from these topics. 

    Past trends in iit jee indicate that one can easily score full
    marks in general physical chemistry.
   

                                    THANK YOU