Question related to Hydration of Alkynes
Due to -I effect from the carbonyl group and the halogen, not far enough for it to be negligible, the stability of the primary vinylic carbocation is counter-intuitively more than that of the secondary vinylic carbocation. Markonikov rule is applicable in absence of permanent electron shift effects, like resonance and inductive effects. The Markonikov rule, under these restrictions, translates into the stability of the carbocation, decided by the positive inductive effect of neighbouring carbons. As a clearer example, consider the hydration of acrolein,

The reaction predominantly yields the primary alcohol, as opposed to the product predicted by the markonikov rule, which again is not applicable in presence of permanent electronic effects. Hope that helps!