which is an example of dissociation?\no c + o2 → co2\no nh3 + h2o → nh4+ + oh-\no so2 + h2o → hso3- + h+\no…

which is an example of dissociation?\no c + o2 → co2\no nh3 + h2o → nh4+ + oh-\no so2 + h2o → hso3- + h+\no ca3(po4)2 → 3ca2+ + 2po43-
Answer
Explanation:
Step1: Define dissociation
Dissociation is the process by which a compound breaks into its constituent ions in solution.
Step2: Analyze each option
- For $C + O_2\rightarrow CO_2$, this is a combination reaction, not dissociation.
- For $NH_3 + H_2O\rightarrow NH_4^++OH^-$, ammonia reacts with water in a reaction that is more of a base - water reaction rather than simple dissociation of a single compound into ions.
- For $SO_2 + H_2O\rightarrow HSO_3^-+H^+$, sulfur - dioxide reacts with water in a reaction that is not simple dissociation of a single compound into ions.
- For $Ca_3(PO_4)_2\rightarrow3Ca^{2 +}+2PO_4^{3 -}$, calcium phosphate breaks into calcium ions and phosphate ions. This is an example of dissociation.
Answer:
$Ca_3(PO_4)_2\rightarrow3Ca^{2 +}+2PO_4^{3 -}$