GoatQueen3
Answered

Which equation is a decomposition reaction?

ALi2CO3 ---> Li2O + CO2

BZn + HCl ---> ZnCl2 + H2

CNa2O + CO2 ---> Na2CO3

DC6H12O6 + O2 ---> CO2 + H2O


please help asap

Verified Answer :

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) \(Li_2CO_3\rightarrow Li_2O+CO_2\) is a decomposition reaction.

Explanation :

(a) \(Li_2CO_3\rightarrow Li_2O+CO_2\) 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) \(Zn+2HCl\rightarrow ZnCl_2+H_2\) 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) \(Na_2O+CO_2\rightarrow Na_2CO_3\) is a combination reaction.

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

(d) \(C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O\) 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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