Class 10 chemistry

Chemical reaction

1. When two or more substances or matter combine to form new substances having different properties that would be chemical reaction.
2. Example- rusting of iron, fermentation of grapes, cooking food, etc

                  Cu+o2- cu20
                  Fe+o2- fe3o4
        Candle wax turn into liquid then gas...is an example of chemical reaction.
 

•  Chemical reaction is of different tupe..

1. Addition reaction/combination reaction
2. Decomposition/elimination reaction
3. Displacement reaction
4. Double displacement reaction
5. Exothermic reaction
6. Endothermic reaction..