This presentation contains all the topics of 10th science chapter chemical reactions and equation of CBSE.

2. CHEMICAL REACTION :-
THE PROCESS IN WHICH THE SUBSTANCES TAKEN (REACTANTS) LOOSE
THEIR NATURE AND IDENTITY TO FORM A NEW CHEMICAL SUBSTANCE
WITH DIFFERENT CHEMICAL PROPERTIES
CHEMICAL EQUATION :-
THE REPRESENTATION OF A CHEMICAL REACTION BY USING THE
SYMBOLS AND FORMULAE OF THE DIFFERENT REACTANTS AND
PRODUCTS IS CALLED AS CHEMICAL EQUATION

3. BALANCED & UNBALANCED CHEMICAL EQUATION
AN EQUATION IN WHICH THE NUMBER OF ATOMS OF EACH ELEMENT ARE
EQUAL ON BOTH SIDES OF THE EQUATION IS CALLED A BALANCED
CHEMICAL EQUATION.
IF THE NUMBER OF ATOMS OF EACH
ELEMENT ARE NOT EQUAL ON BOTH THE
SIDES OF THE EQUATION THEN IT IS CALLED
UNBALANCED OR SKELETAL EQUATION.

8. EXAMPLE OF DECOMPOSITION
REACTION

10. EXOTHERMIC REACTION
REACTION IN WHICH HEAT IS
RELEASED ALONG WITH THE
FORMATION OF PRODUCTS ARE
CALLED EXOTHERMIC REACTION.

11. EXAMPLES OF EXOTHERMIC
REACTION

12. ENDOTHERMIC REACTION
A REACTION IN WHICH ENERGY IS ABSORBED
FROM ITS SURROUNDING; USUALLY, BUT NOT
ALWAYS , IN THE FORM OF HEAT. THIS TYPE OF
REACTION IS CALLED ENDOTHERMIC REACTION.

13. EXAMPLES OF ENDOTHERMIC
REACTION

15. DISPLACEMENT REACTION
THESE ARE THE REACTIONS IN WHICH A MORE
REACTIVE ELEMENT DISPLACES LESS REACTIVE
ELEMENT FROM ITS COMPOUND.

16. EXAMPLE OF DISPLACEMENT REACTION

17. DOUBLE DISPLACEMENT REACTION
THESE ARE THE REACTIONS IN WHICH TWO IONIC
COMPOUNDS IN A SOLUTION EXCHANGE THEIR IONS
TO FORM NEW COMPOUND. ONE OF THE PRODUCTS
IS A PRECIPITATE OR A GAS.

18. EXAMPLE OF DOUBLE DISPLACEME

19. OXIDATION AND REDUCTION
OXIDATION
IT IS DEFINE AS A PROCESS WHICH INVOLVES
GAIN OF OXYGEN
 LOSS OF HYDROGEN
REDUCTION
IT IS DEFINE AS A PROCESS WHICH INVOLVES
 GAIN OF HYDROGEN
 LOSS OF OXYGEN

20. EXAMPLES OF OXIDATION AND REDUCTION

21. CORROSION
THE PROCESS OF SLOWLY EATING UP OF THE METALS DUE TO
THE ATTACK OF ATMOSPHERIC GASES SUCH AS OXYGEN ,
CARBON DIOXIDE , HYDROGEN SULPHITE , WATER VAPOUR
ETC ON THE SURFACE OF THE METAL INTO OXIDE ,
CARBONATE SULPHITE ETC IS KNOWN AS CORROSION.

22. EXAMPLE OF CORROSION
THE MOST COMMON EXAMPLE OF CORROSION IS RUSTING OF IRON. THIS
HAPPENS WHEN A IRON NAIL OR ARTICLE
REMAINS EXPOSED TO MOIST AIR FOR A LONG TIME , ITS SURFACE IS
COVERED WITH A BROWN FLAKY SUBSTANCE CALLED RUST. IT IS FORMED
DUE TO ATTACK OF ATMOSPHERIC GASES IN THE AIR ON THE SURFACE OF
IRON NAIL OR ARTICLE.

23. RANCIDITY
THE OXIDATION OF OILS OR FATS IN A FOOD
CONTAINING OIL OR FAT RESULTING INTO A
BAD SMELL AND BAD TASTE IS CALLED
RANCIDITY

24. EXAMPLES OF RANCIDITY
IF CHIPS OR ANY OILY FOOD REMAINS EXPOSED IN THE MOIST AIR
THEN THE OILY FOOD WILL BE OXIDISED AND AS A RESULT A BAD
SMELL AND BAD TASTEWILL BE THEIR IN THE FOOD. TO PREVENT
CHIPS LIKE PRODUCTS FROM RANCIDITY NITROGEN GAS IS
FILLED IN THE PACKETS DURING PACKAGING .

25. JYOTI YADAV