Which of the following is a single displacement(replacement) reaction? 2HClO 4 (

Question

Which of the following is a single displacement(replacement) reaction?

2HClO4(aq) + Mg(OH)2(s) -----> Mg(ClO4)2(aq)   + 2H2O(l)

none of these are

Cl2(g)   + 2NaI(s)   ------> 2NaCl(s) + I2(s)

Ca(ClO3)2(s) ------> CaCl2(s) + 3O2(g)

Pb(NO3)2(aq)   + 2NaCl(aq)   -----> PbCl2(s) + 2NaNO3(aq)

MgO(s) + H2O(l) -----> Mg(OH)2(s)

C2H4(g) + 3O2(g) ---> 2CO2(g) + 2H2O(g)

A.

2HClO4(aq) + Mg(OH)2(s) -----> Mg(ClO4)2(aq)   + 2H2O(l)

B.

none of these are

C.

Cl2(g)   + 2NaI(s)   ------> 2NaCl(s) + I2(s)

D.

Ca(ClO3)2(s) ------> CaCl2(s) + 3O2(g)

E.

Pb(NO3)2(aq)   + 2NaCl(aq)   -----> PbCl2(s) + 2NaNO3(aq)

F.

MgO(s) + H2O(l) -----> Mg(OH)2(s)

G.

C2H4(g) + 3O2(g) ---> 2CO2(g) + 2H2O(g)

Explanation / Answer

Cl2(g)   + 2NaI(s)   ------> 2NaCl(s) + I2(s)

C.

Cl2(g)   + 2NaI(s)   ------> 2NaCl(s) + I2(s)

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