DCMC CLASS IX AND X CHEMISTRY

https://drive.google.com/open?id=0B-Nzace_NdyYYWdGWE5kbmp6OGtsZG00MU44dUJ3LUE2STk4

EXTRACTION OF METALS!!

Types of chemical reaction   1. C ombination reaction     https://www.youtube.com/watch?v=ND6jB2CNh3c 2. Decomposition reaction   https://www.youtube.com/watch?v=1ocQhkHw_MM   3. Displacement reaction https://www.youtube.com/watch?v=7jzKNQCGdTg 4. Double displacement reaction   https://www.youtube.com/watch?v=sviKA633SWw 5. Reduction-Oxidation reaction (Redox reaction) https://www.youtube.com/watch?v=zYlOD1GWMBU                                                

               How to balance a chemical reaction?  

                    Chemical reaction and equation Chemical reaction  :- the process in which orignal substance looses its nature and identity and new chemical substance will be formed with new chemical properties is called chemical reaction.                         example :-    cooking of food                                             digestion of food                                               respiration                                             burning of fuels Characteristics of chemical reaction:- 1.Change in colour 2.  Change in state                                                                                                                                     3.  Change in temperature                                                                                                                                                            4.  Evolution of gas