Question

In plants, the water molecules split into hydrogen and oxygen with the help of ............ energy.

• A. Light
• B. Chemical
• C. Mechanical
• D. Electrical

Answer 1

The correct option is A Light

The process of water dissociation during photosynthesis is called as photooxidation of water. It requires the presence of Mn${}^{++}$, Ca${}^{+}$, and Cl${}^{-}$, a water oxidizing enzyme etc. It takes place during the light reaction of photosynthesis. So, the correct answer is option A.