Question

17. Which of the following reaction is called double displacement reaction?
a)Zn(s)+CuS04(aq)------→ZnSO4(aq)+Cu

B)Pb(s)+CuCl2(aq)------→ PbCl2(aq)+Cu

(c) Na2SO4(q) +BaCl2(aq)-----→BaSo4+2Nacl
(D) C(s)+2H2----→CH2​

Answer 1

Answer:

c)

Explanation:

because in this reaction two compounds had exchange their ions to form to new compounds

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Answer 2

Answer:

The answer is (c) Na2SO4(q)+BaCl2(aq)---->BaSO4+2NaCl

Explanation:

Because in this equation both compounds exchange ions to form new compound as seen Ba with SO4 and Na with Cl

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