Question

Observe double displacement reaction given in text book and write down similarities

Answer 1

double displacement reaction 2 compounds react with each other to exchange they are ions to form 2 new compound.

FOR EXAMPLE:---
AgNO3+NaCl →. AgCl +NaNo3

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Answer 2

K2CrO4 + BaSO4 gives out BaCrO4 + K2SO4  the precipitate of barium chromate is formed.The reaction in which reactants exchange their ions to form precipitate is called as double displacement reaction.