बिहार STET news

Bihar stet exam has postponed due to the high court decision...
The examination were scheduled on November 7th but now it is postponed for uncertain time..


Don't follow the rumers about different perception which is being uploaded on you tube and article..
Previously examination was on 7th November but high court given 8 year relaxation for those condidate who's age is above then given creteria..

Firstly portal will be open for those who are overaged..after that examination date will be announced..

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..