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Question

Which of the following double displacement reaction?


A

Pb+CuCl2PbCl2+Cu

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B

H2+Cl22HCl

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C

BaCl2+K2SO4BaSO4+2KCl

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Solution

The correct option is C

BaCl2+K2SO4BaSO4+2KCl


Explanation for correct option:

(C) BaCl2(aq)+K2SO4(aq)BaSO4(aq)+2KCl(aq)

Double displacement reaction:

  • A double displacement reaction is a type of reaction in which two compounds exchange their ions to form a set of two new compounds.
  • In double displacement reactions, cations and anions exchanges their places.
  • A double displacement reaction is represented by the general equation.

AB+CDAD+CB

  • An example of a double displacement reaction is given below:
  • When Barium chloride reacts with Potassium sulfate, it produces Barium sulfate and Potassium chloride.
  • The chemical reaction can be given as:

BaCl2(aq)+K2SO4(aq)BaSO4(aq)+2KCl(aq)

Explanation for incorrect options

(A) Pb(s)+CuCl2(aq)PbCl2(aq)+Cu(s)

This is an example of a single displacement reaction.

(B) H2(g)+Cl2(g)2HCl(g)

This is an example of a redox reaction. H2 is oxidized and Cl2 is reduced.

Hence, option (C) is the correct answer. BaCl2(aq)+K2SO4(aq)BaSO4(aq)+2KCl(aq) is a double displacement reaction.


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