Which of the following chemical reactions is a decomposition reaction?


2 HgO → 2 Hg + O2


Al + 3 CuCl → AlCl3 + 3 Cu


2 H2 + O2 → 2 H2O


HCl + NaOH → NaCl + H2O

Respuesta :

Answer:

2 HgO → 2 Hg + O2

Explanation:
Decomposition is when one reactant breaks down into two or more products due to heat, light or electricity
Here mercury (II) oxide goes through thermal decomposition to make mercury and oxygen

Answer:

2HgO—»2Hg+O_2

Explanation:

The decomposition reaction

  • It's reaction in which a single reactant gives two or more than two products

Here Mercury oxide gives mercury and oxygen

so option A is decomposition