Plz give me important basic Conceptsonly which is required for ICSE 10 like observation type how to answer them and how to form different equations etc only for ICSE 10

@ ananya 
can u please elaborate the ques little bit , like which type of observation , in observation , u will be given a chemical reaction , u have to perform that in the labrotory and then u have to record your observation in tabular form . 
and abt the forming the equation , as per your level in class 10^th , u have to remember the following thing 
1- reactants u have to put in the left side and product on the right side . 
2- while making equation make sure u will add oxidising as well as reducing agent . 
3- after that try to balance the equation , and make balance of ions also . 
4- after that check all the things on the right hand side , will must have to equal in the left hand side , that is what we called as equation . 
HOPE IT CLEARS YOUR DOUBT 

ALL THE BEST ..