Question

brief explanation about types of chemical reactions with examples for each

Answer 1

HERE IS YOUR ANSWER

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The different types of chemical reactions


COMBINATION REACTION

In this type of reaction two pr more reactants combine to form a single product.
Example: 2Na + Cl2 ---------> 2NaCl


DECOMPOSITION REACTION
In this type of reaction a single reactant breaks to form two or more products.
It is further categorized on the basis of energy applied.
Example:
CaCO3 ---Heat------> CaO + CO2 (THERMAL DECOMPOSITION REACTION)

2H2O ----electricity---> 2H2 + O2 (ELECTROCHEMICAL DECOMPOSITION REACTION)

2AgCl ---sunlight------> 2Ag + Cl2 (PHOTOCHEMICAL DECOMPOSITION REACTION)


DISPLACEMENT REACTION
In this reaction , the more reactive element displaces the less reactive element from it's compound.
Example: Fe2O3 + 2Al ------> Al2O3 + 2Fe


DOUBLE DISPLACEMENT REACTION
In this type of reaction , the radicals mutually exchange their positions.

Example: NaBr + AgCl -----> AgBr + NaCl.

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Answer 2

In a double displacement or metathesis reaction two compounds exchange bonds or ions in order to form different compounds.

Double displacement reaction 

AB + CD → AD + CB

An example of a double displacement reaction occurs between sodium chloride and silver nitrate to form sodium nitrate and silver chloride.

NaCl(aq) + AgNO3(aq) → NaNO3(aq) + AgCl(s)

combustion reaction

A combustion reaction is a type of redox reaction in which a combustible material combines with an oxidizer to form oxidized products and generate heat (exothermic reaction). Usually, in a combustion reaction oxygen combines with another compound to form carbon dioxide and water. An example of a combustion reaction is the burning of naphthalene:

C10H8 + 12 O2 → 10 CO2 + 4 H2O

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