SELECT * FROM question_mgmt as q WHERE id=3503 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=252 and ex_no='4' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Chemical reaction and Equation what is the difference between displacement and do

Question:

What is the difference between displacement and double displacement reactions? Write equations for these reactions.

Answer:

Displacement Reaction :  In this reaction more reactive element displaces the less reactive element

                                             AB     +     C     →     AC     +     B

eg.: 

(i)   Fe  +  CuSO4  →  FeSO4  +  Cu
(ii)   Pb  +  CuCl2  →  PbCl2  +  Cu


Double Displacement Reaction :  In this reaction exchange of ions takes place

                                             AB     +     CD     →     AC     +     BD

eg.: 

(i)   Na2SO4  +  BaCl2  →  2NaCl  +  BaSO4
(ii)   HCl  +  AgNO3  →  AgCl  +  HNO3


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