Question

Which of these excerpts from poems by Emily Dickinson uses irony?

Answer 1

In my opinion, the whole poem is quite ironic - although she is mentioning the exultation and the royal color of death, the poem itself begins with the narrator saying that she cannot breathe - that she doesn't want to die.
So, I would say that the ironic parts are: 
Exultation is the going
Of an inland soul to sea, -
Past the houses, past the headlands,
Into deep eternity!