Question

Which reaction below represents a balanced, double replacement chemical reaction? A) C2H5OH + 3O2 → 2CO2 + 3H2O B) Rb2O + Cu(C2H3O2)2 → 2RbC2H3O2 + CuO C) 2Al + 3H2SO4 → 3H2 + Al2(SO4)3 Eliminate D) 2H2O → 2H2 + O2

Answer 1

Option B. Rb2O + Cu(C2H3O2)2 → 2RbC2H3O2 + CuO is the correct answer. HOPE IT HELPS

Answer 2

Answer: The correct answer is Option B.

Explanation:

Double displacement reaction is defined as the reaction in which exchange of ions takes place.

$AB+CD\rightarrow CB+AD$

For the given options:

• Option A:

The chemical equation follows:

$C_2H_5OH+3O_2\rightarrow 2CO_2+3H_2O$

This is a type of combustion reaction because an organic compound reacts with oxygen gas to produce carbon dioxide gas and water molecule

• Option B:

The chemical equation follows:

$Rb_2O+Cu(C_2H_3O_2)_2\rightarrow 2RbC_2H_3O_2+CuO$

This is a type of double displacement reaction.

• Option C:

The chemical equation follows:

$2Al+3H_2SO_4\rightarrow 3H_2+Al_2(SO_4)_3$

This is a type of single displacement reaction because a more reactive metal (aluminium) is replacing a less reactive metal (hydrogen).

• Option D:

The chemical equation follows:

$2H_2O\rightarrow 2H_2+O_2$

This is a type of decomposition reaction because a single large compound is getting broken down to smaller substances.

Hence, the correct answer is Option B.