Question

learning: molecular compounds - acids (binary & oxyacids)
question ①
what anion will form carbonic acid?
answer
co₃⁻
co₃²⁻
co₂²⁻
co₄²⁻
i dont know yet

Explanation:

Carbonic acid ($H_2CO_3$) dissociates to release hydrogen ions ($H^+$) and the carbonate anion ($CO_3^{2 - }$). So the anion that forms carbonic acid is the carbonate anion.

Answer:

$CO_3^{2 - }$ (the second option among the given ones which should be $CO_3^{2 - }$ assuming there is a typo in the display where the superscript formatting might be off)