Question

What is the difference between displacement reaction and double displacement reaction.

Answer 1

Displacement reaction is a chemical change, in which a more active element displaces a less reactivate element from its salt solution. ... Double displacement reaction is a chemical change in which two compounds exchange their radicals with each other to form new compounds. Example - Mg + H2So4 ---> MgSo4 + H2.

Answer 2

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ANSWER :

DISPLACEMENT REACTION :

A single-replacement reaction is a chemical reaction in which one element is substituted for another element in a compound, generating a new element and a new compound as products. 

For example,

2HCl(aq)+Zn(s)→ZnCl2(aq)+H2(g) 

The hydrogen atoms in HCl are replaced by Zn atoms, and in the process a new element hydrogen is formed. 

DOUBLE DISPLACEMENT REACTION:

A double-displacement reaction occurs when parts of two ionic compounds are exchanged, making two new compounds. A characteristic of a double-replacement equation is that there are two compounds as reactants and two different compounds as products.

 An example :

CuCl2(aq)+2AgNO3(aq)→Cu(NO3)2(aq)+2AgCl(s)

There are two equivalent ways of considering a double-replacement equation,either the cations are swapped, or the anions are swapped. 

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