(a) Why are decomposition reactions called the opposite of combination reactions ? Explain with equations of these reactions.
(b) Express the following facts in the form fo a balanced chemical equation :
"When a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed"
(a) Why are decomposition reactions called the opposite of combination reactions ? Explain with equations of these reactions.
(b) Express the following facts in the form fo a balanced chemical equation :
"When a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed"
Those reactions in which a compound splits up into two or more simpler substances are known as decomposition reactions.
Example: When calcium carbonate is heated, it decomposes to give calcium oxide and carbon dioxide.
They are called opposite of combination reactions because in a combination reaction, two or more substances combine to form a single substance.
Example: Magnesium and oxygen combine, when heated, to form magnesium oxide.
(b) 
Those reactions in which a compound splits up into two or more simpler substances are known as decomposition reactions.
Example: When calcium carbonate is heated, it decomposes to give calcium oxide and carbon dioxide.
They are called opposite of combination reactions because in a combination reaction, two or more substances combine to form a single substance.
Example: Magnesium and oxygen combine, when heated, to form magnesium oxide.
(b)
