Question

define combination reaction, decomposition reaction , double displacement reaction, displacement reaction and oxidation and reduction .

Answer 1

Heya friend,
Here are the answers:


1. Combination reaction - A reaction in which two substances or elements join together to form a single substance is called combination reaction. This type of reaction is also known as addition reaction.

example -  C + $O_{2}$ = $CO_{2}$


2. Decomposition reaction - When a single reactant breaks down to form simpler substances is called a decomposition reaction. 

example - $CaCO_{3}$ - CaO + $CO_{2}$


3. Displacement reaction - A reaction in which a more reactive metal displaces a less reactive metal is called displacement reaction.

example -  Fe + $CuSO_{4}$ - $FeSO_{4}$ + Cu


4. Double displacement reaction - A reaction in which there is an exchange of ions between reactants is called double displacement reaction.

example - $Na_{2}$$SO_{4}$ + $BaCl_{2}$  -  $BaSO_{4}$ + 2NaCl


5. Oxidation reaction - Addition of oxygen or removal of hydrogen in a reaction is called oxidation reaction.

example - 2Cu + $O_{2}$ - 2Cuo. Here copper is oxidised to copper oxide.


6. Reduction reaction - A reaction in which there is an addition of hydrogen or removal of oxygen is known as reduction reaction.

example - CuO + $H_{2}$ - Cu + $H_{2}O$. Here hydrogen is oxidised to form water.



there is one more....



Redox reaction - A reaction in which both oxidation and reduction takes place is known as redox reaction.

The example in oxidation and reduction reaction is the example of this reaction.  



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