Name: Effective Collisions
Uploaded: 2019-07-19
Duration: 5 min 12 s
Description: According to collision theory, the rate of a reaction depends upon the effective collisions between the reactant molecules. Watch this video to know more abo...

Question

Where do chemical reactions take place? Give some examples of different types of chemical reactions.

Accepted Answer

Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

The five primary types of chemical reactions are:

Combination reaction: A reaction in which two or more reactants combine to form a single product is known as a combination reaction.

Example of combination reaction: $2 Na + {Cl}_{2} \to 2 NaCl$ .

Decomposition reaction: A reaction in which a single compound breaks into two or more simpler compounds is known as a decomposition reaction.

Example of a decomposition reaction: ${CaCO}_{3} \to CaO + {CO}_{2}$ .

Displacement reaction: A chemical reaction in which a more reactive element displaces a less reactive element from its aqueous salt solution.

Example of displacement reaction: $Zn + {CuSO}_{4} \to {ZnSO}_{4} + Cu$ .

Double Displacement reaction: A chemical reaction in which ions get exchanged between two reactants which form a new compound is called a double displacement reaction.

Example of double displacement reaction: ${BaCl}_{2} + {Na}_{2} {SO}_{4} \to {BaSO}_{4} + 2 NaCl$ .

Precipitation reaction: A chemical reaction that involves the formation of an insoluble product (precipitate; solid) is called Precipitation reaction.

Example of precipitation reaction: $NaCl + {AgNO}_{3} \to AgCl + {NaNO}_{3}$ .

Where do chemical reactions take place? Give some examples of different types of chemical reactions.

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