Final answer:
Carbocation rearrangements can occur during both ozonolysis and alkylation of an alkyne reactions. In alkylation of an alkyne, rearrangements can occur as a result of the stabilization of the carbocation through inductive effects by adjacent carbons.
Step-by-step explanation:
Carbocation rearrangements can occur during both ozonolysis and alkylation of an alkyne reactions, but not during alkylation of an alkyne only or ozonolysis only.
In ozonolysis, carbocation rearrangements may take place during the formation of carbocations as intermediates.
In alkylation of an alkyne, rearrangements can occur as a result of the stabilization of the carbocation through inductive effects by adjacent carbons.