Question

Is photosynthesis a double replacement or single replacement reaction?

Answer 1

Photosynthesis is a single displacement reaction.

Explanation:

This is the formula for photosynthesis:

6`CO_2` + 6`H_2O` `->` 6`O_2` + `C_6H_12O_6`

During the light reactions, the water molecules' hydrogen ions are separated from the oxygen atoms, which combine to form oxygen gas molecules which are released into the atmosphere as a waste product.

During the Calvin cycle, CO2 and hydrogen ions from the water combine to form glucose `C_6H_12O_6`.