Question

give one example each of displacement decomposition and combination reaction with explanation

Answer 1

$\bf{Combination \: Reaction}$:

$\bf\underline{\textit{Definition}}$:

• A reaction in which 2 or more elements/compounds combine to form a new compound is called as an Combination Reaction.

$\bf\underline{\textit{Examples}}$:

• General Example (Theoretical):-
$\boxed{X + Y = XY}$

•Chemical Example (Practical):-
$\boxed{H_2 + O_2 ---> 2H_2O}$

Hydrogen and Oxygen combine to form Water.
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$\bf{Decomposition\: Reaction}$:

$\bf\underline{\textit{Definition}}$:

• A reaction in which a single compound breaks down to give 2 or more elements/compounds is called as an Decomposition Reaction.

$\bf\underline{\textit{Examples}}$:

• General Example (Theoretical):-
$\boxed{XY = X + Y}$

• Chemical Example (Practical):-
$\boxed{ CaCO_3--->CaO + CO_2}$

When Calcium Carbonated is heated strongly, it undergoes thermal decomposition to form Calcium Oxide and Carbon Dioxide.