Question

Which is an example of dissociation?
A. C + O2 CO2
B. NH3 + H2O NH4+ + OH–
C. SO2 + H2O HSO3– + H+
D. Ca3(PO4)2    3Ca2+ + 2PO43–

Answer 1

D is the correct answer! YAYYYYYYAA!!

Answer 2

Answer: Option (D) is the correct answer.

Explanation:

A dissociation reaction is a reaction in which in which a compound splits or dissociates into its ions.

For example, $Ca_{3}(PO)_{4} \rightarrow 3Ca^{2+} + 2PO^{3-}_{4}$

Whereas when two elements combine together and results in the formation of a single compound then it is known as synthesis reaction.

For example,   $C + O_{2} \rightarrow CO_{2}$

On the other hand, when $NH_{3}$ is dissolved in water then it gives ammonium and hydroxide ions.

Thus, we can conclude that out of the given options $Ca_{3}(PO)_{4} \rightarrow 3Ca^{2+} + 2PO^{3-}_{4}$ is an example of dissociation.