Question

what a chemical reaction . Name the different kinds of reaction . Give example of each reaction​

Answer 1

Answer:

Explanation :-

Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products.

Kinds of chemical reaction:-

1. Combination reaction.

E.g :- 8 Fe + S8 → 8 FeS.

2. Decomposition reaction.

E.g:- 2 H2O → 2 H2 + O2

3. Displacement reaction.

E.g:- Zn + 2 HCl → ZnCl2 + H2

4. Double displacement reaction.

E.g:- NaCl(aq) + AgNO3(aq) → NaNO3(aq) + AgCl(s)

5. Neutralisation reaction.

E.g:- HBr + NaOH → NaBr + H2O

6. Redox reaction.

E.g:- 2 S2O32−(aq) + I2(aq) → S4O62−(aq) + 2 I−(aq)

Answer 2

Answer:

chemical reaction - whenever a chemical change occurs ,a reaction take place which is known as chemical reaction .

kinds of reaction-

1)combination reaction

eg-C+02 gives CO2,

Other reaction -

a)exothermic reaction

eg -C+O2=CO2

b)endothermic reaction

eg-CO2=C+O2

2)Decomposition  reaction

eg-AB=A+B

it has three types

1-thermal reaction

eg-Caco3=cao+co2

2-electrolysis reaction

eg-2H2o=2H2+o2

3-photolysis reaction    

eg-2AgCl gives in the form of sunlight  2Ag+Cl2

3)displacement reaction

eg -A+B=AB,

Fe+CuSo4=FeSo4+Cu

4)double displacement

eg- AB+CD=AC+BD ,

TYPES-

1-precipitate (ppt)reaction -insoluble substance

eg-Na2So4+BaCl2=BaSo4+2NaCl

2- nutrilisation reaction  

eg-Acid+Base=Salt+Water,

HCL+NaOH=NaCL+H2O

5)Redox reaction - oxygen is added,hydrogen is reduce or vise-vasa

1)oxidiation reaction

eg-2Cu+O2=2CuO

here, oxygen is added.

2)reduction reaction

eg- CuO+H2=Cu+H2O

here Cu is reduce from CuO