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 of 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".

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Solution

Those reactions in which a compound splits up into two or simpler substances are known as decomposition reactions.
Example: When calcium carbonate is heated, it decomposes to give calcium oxide and carbon dioxide.

$C a C O_{3} H e a t - --------- \to (D e c o m p o s i t i o n) C a O$ $+$ $C O_{2 (g)}$
Calcium carbonate Calcium oxide Carbon dioxide
(Limestone) (Lime)

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 formed magnesium oxide.

a) $2 M g_{(s)} + O_{2} C o m b i n a t i o n ⟶ 2 M g O_{(s)}$
Magnesium Oxygen Magnesium Oxide

b) $C u_{(s)} + 2 A g N O_{3 (a q)} \to C u (N O_{3})_{2 (a q)} + 2 A g_{(s)}$

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Similar questions

Q. (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 of 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".

Q. A student was given two metal strips X and Y alongwith colourless silver nitrate solution to perform two separate displacement reactions. When the student placed metal strip X in silver nitrate solution for a considerable time, he observed that the solution turned blue and a coating of silver metal was formed on the strip. And when the student immersed metal strip Y in silver nitrate solution for an equal time, he observed that the solution turned light green with the formation of a coating of silver metal on the strip. The correct conclusion of the student about the identity of metals X and Y is :
(1) X is copper and Y is magnesium
(2) X is zinc and Y is copper
(3) X is iron and Y is copper
(4) X is copper and Y is iron

In the refining of silver, the recovery of silver from silver nitrate solution displacement by copper metal . Write down the chemical equation of the reaction involved.

How can we balance the following.

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.

Can you explain it with steps

Write the reactants and the products in equation form

When a strip of copper is placed in an aqueous solution of silver nitrate, copper(II) nitrate and silver are formed. Name the type of reaction.

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