explain all types of chemical reaction in detail
Answers
Answer:
a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction is called chemical reaction
Explanation:
A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products. ... A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
Ans:- Types of chemical reaction
1. Combination reaction:- Reaction in which two or more reactants combined to form a single product is known as combination reaction.
Ex:- C+O2 => CO2
2. Decomposition reaction:- Reaction in which single reactants decomposes to form two or more products.
(ii). There are three types of decomposition reaction.
(iii). Ex- CaO =>∆ Ca + O2
Types:-
a. Thermolysis:- Decomposition reaction which require heat.
Ex- CaCO3 =>∆ Ca(O) + CO2
b. Photolysis:- Decomposition reaction which require light.
Ex- H2O2 =>∆ H2O + O2
c. Electrolysis:- Decomposition reaction which require electricity.
Ex- H2O =>∆ H2 + O2
3. Displacement reaction:- Reaction in which a highly reactive element displaces a less reactive element from its compound.
Ex- Fe + CuSO4 => FeSO4 + Cu
4. Double-displacement reaction:- Reaction in which mutual exchanges of ions take place.
Ex- Al2(SO4)3 + Ca(oH)2 => Al(oH)3 + CaSO4
5. Precipitation reaction:- Reaction in which precipitate gets formed.
*precipitate:- Insoluble salt.
Ex- Pb(NO3)2 + Kl => KNO3 + Pbl2
here KNO3 is precipitate.
6. Redox reaction:- Reaction in which oxidation and reduction take place simultaneously is called redox reaction.
*Oxidation:- Gain of oxygen or loss of hydrogen, electron by a substance is known as oxidation.
*Reduction:- Gain of hydrogen, electron or loss of oxygen by a substance is known as reduction.
*Oxidising agent:- Substance that loses hydrogen or gain oxygen and oxidises other.
*Reducing agent:- Substance that loses oxygen or gain hydrogen and reduces other.
7. Endothermic reaction:- Reaction in which heat is absorbed and used to cools the surroundings.
Ex:- Photosynthesis.
CO2 + H2O + sunlight => C6H12O6 + O2
8. Exothermic reaction:- Reaction in which heat is released and cause the temperature of surrounding to rise.
Ex- Respiration
C6H12O6 + O2 => CO2 + H2O + Energy
note:- Most decomposition reaction are endothermic and most combination reaction are exothermic.
9. Neutralisation reaction:- Reaction in which Acid reacts with Base to form salt and water.
Ex:- H2SO4 + NaOH => Na2SO4 + H20
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