Question

7 which type of reaction is shown in the chemical equation 2h₂o → 2h₂ + o₂? a synthesis b decomposition c double displacement d single displacement e combustion

Explanation:

A decomposition reaction breaks a compound into simpler substances. Here, water ($H_2O$) is broken down into hydrogen ($H_2$) and oxygen ($O_2$). In synthesis, simpler substances combine to form a compound. In double - displacement, two compounds exchange ions. In single - displacement, one element replaces another in a compound. In combustion, a substance reacts with oxygen, often producing heat and light.

Answer:

B. decomposition