Question

With carbon dioxide into the ocean, it reacts with water and carbonate to form

Carbonic acid

Bi carbonate

Calcium carbonate

Oxygen

Answer 1

When carbon dioxide (CO₂) enters the ocean, it reacts with water (H₂O) to form carbonic acid (H₂CO₃). This can further dissociate to bicarbonate (HCO₃⁻) and carbonate ions (CO₃²⁻), but the initial reaction is:

**Carbonic acid**

So, the correct answer to your question is **Carbonic acid**.