GoatQueen3
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Which equation is a decomposition reaction?

a. Li2CO3 ---> Li2O + CO2

b. Zn + HCl ---> ZnCl2 + H2

c. Na2O + CO2 ---> Na2CO3

d. C6H12O6 + O2 ---> CO2 + H2O


please help asap

Respuesta :

AbhiGhost
The reaction in which reactant breaks down into more than one constituents is called decomposition reaction. So option A. Li2CO3 ---> Li2O + CO2  is correct. 

Answer : (a) [tex]Li_2CO_3\rightarrow Li_2O+CO_2[/tex] is a decomposition reaction.

Explanation :

(a) [tex]Li_2CO_3\rightarrow Li_2O+CO_2[/tex] is a decomposition reaction.

  • Decomposition reaction : It is a type of chemical reaction in which a single compound decomposes into two or more compounds.

(b) [tex]Zn+2HCl\rightarrow ZnCl_2+H_2[/tex] is a displacement reaction.

  • Displacement reaction : It is a type of reaction in which a most reactive element displaces the least reactive element in a compound.

(c) [tex]Na_2O+CO_2\rightarrow Na_2CO_3[/tex] is a combination reaction.

  • Combination reaction : It is a type of reaction where two or more compounds combine to form a single compound.

(d) [tex]C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O[/tex] is a combustion reaction.

  • Combustion reaction : It is a type of reaction where a hydrocarbon react with the oxygen to produced carbon dioxide and water.

Therefore, option (a) is a decomposition reaction.

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