Question

What is displacement reaction?​

Answer 1

A single-displacement reaction, is a chemical reaction in which one element replaces an/other element in a compound. It can be represented generically as: A + B-C → A-C + B This will most often occur if A is more reactive than B, thus giving a more stable product. 

Answer 2

$\large{\underline{\underline{\red{\bf{\dag Displacement\:Reac^n \dag}}}}}$

• A reaction in which a more reactive element displaces a less reactive element from its salt solution is called a displacement reaction.

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${\underline{\pink{\bf{\leadsto Reac^n\:of\:Iron\:with\:CuSO_4:}}}}$

• When an iron nail is placed in the copper sulphate solⁿ which is blue in colour , after some time it is seen that the colour changes to light green and the iron nail becomes brownish in colour due to deposition of copper.
• In this reacⁿ iron being more reactive , displaces copper from copper sulphate solⁿ.

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${\underline{\green{\bf{\leadsto Some\:more\: examples:}}}}$

$\purple{\sf{\mapsto\underset{\footnotesize{Silver\:nitrate}}{ 2AgNO_3}(aq)+Cu\longrightarrow Cu(NO_3)_2(aq)+2Ag(s)}}$

$\purple{\sf{\mapsto 3Fe(s)+4H_2O(g)\longrightarrow Fe_3O_4(s)+4H_2(g)}}$

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${\underline{\orange{\bf{\leadsto Reactivity \:Series:}}}}$

$\boxed{\begin{tabular}{c|1} N ame of Atom & Mnemonics \\ \cline{1-2} \\ Potassium & Please \\ \cline{1-2}\\ Sodium & Stop \\ \cline{1-2}\\ Calcium & Calling \\ \cline{1-2}\\ Magnesium & Me \\ \cline{1-2}\\ Aluminium &A \\ \cline{1-2}\\ Zinc&Zebra \\ \cline{1-2}\\ Iron & In \\ \cline{1-2}\\ Lead & Library \\ \cline{1-2}\\ Hydrogen &Hey\\ \cline{1-2}\\ Copper&Call\\ \cline{1-2}\\ Mercury & Me \\ \cline{1-2}\\ Silver & Some \\ \cline{1-2}\\ Gold & Good \end{tabular}}$