What is the primary chemistry behind a displacement reaction?
One element displaces another from a compound
In a displacement (single displacement) reaction, a more reactive element pushes out a less reactive element from its compound and takes its place. For example, iron displaces copper: Fe + CuSO₄ → FeSO₄ + Cu.
The driving force is the reactivity series: only an element above another in reactivity can displace it, which is why the more active metal ends up in the compound.
"Two reactants combine to generate one product" describes a combination (synthesis) reaction, such as 2H₂ + O₂ → 2H₂O, not displacement.
"Compounds disintegrate into two or more components" describes a decomposition reaction, like 2H₂O → 2H₂ + O₂.
"Ion exchange occurs between two substances" describes a double displacement reaction, where two compounds swap ions, not a single element replacing another.
Hence, the chemistry behind a displacement reaction is that one element displaces another from a compound.
Similar Questions
If a piece of aluminium is added to iron(II) sulphate (FeSO4) solution, what will happen?
Balance the following reaction:
\(3\,\text{MnO}_2\,(s) + x\,\text{Al}\,(s) \rightarrow 3\,\text{Mn}\,(l) + y\,\text{Al}_2\text{O}_3\,(s) + \text{Heat}\)
What type of ions exchange between reactants in a double displacement reaction?
A student tries to balance the equation Fe + H2O → Fe3O4 + H2 and writes the following step:
Fe + H2O4 → Fe3O4 + H2
Which statement best explains why this step is INCORRECT?
What is formed when carbon burns in oxygen?
Identify the correct statement regarding the reaction of sodium carbonate and dilute HCl.
What primary factor determines whether one element can displace another from its compound?
When carbon dioxide gas is passed through lime water (calcium hydroxide solution), it produces a white precipitate which is of:
Read the following statements and choose the correct option.
Statement I: All metals in the reactivity series can displace hydrogen from dilute acids to form hydrogen gas.
Statement II: Metals below hydrogen in the reactivity series do not produce hydrogen gas with dilute acids.
What is the main characteristic of a double displacement reaction?
Important Questions from Chemical Reaction
Which of the following statement is/are true?
I. In physical change new substance is formed. substance is formed.
II. In chemical change no new substance is formed.
Which of the following cells involves similar chemical reactions?
The information not obtained from balanced chemical equation is
Oxygen cannot be obtained by which one of the following methods?
Which of the following statement is correct?
I. Insoluble salt is obtained by precipitation reaction.
II. Addition of oxygen or loss of hydrogen is called oxidation.
