What is the irony in the names "Ministry of Love" and "Ministry of Plenty" in 1984? Did you find any of this irony humorous?
The irony in the names of these Ministries is indeed very striking. The Ministry of Love, for instance, shows anything but love to the people of Oceania and the Ministry of Plenty is, in fact, a source of material deprivation. As this book charts the struggle of one man, Winston, against the Party, a totalitarian government, the reader is unlikely to find any humour in this irony. This humour is, perhaps, reserved for Inner Party members, like O'Brien. For men like him, life is anything but brutal and deprived. O'Brien, for example, is allowed to drink wine and turn off his telescreen while those below, like Winston and Julia, become increasingly dependent and alienated.
In using irony in this way, Orwell makes one of his most important points of 1984: that totalitarian regimes care more about maintaining absolute power than about the lives of the people they rule.
One definition of irony is a situation in which the outcome of something is the opposite of what you would expect. Using this definition, these ministry names are certainly ironic.
They are ironic because these ministries "produce" the opposite of what you would think they would. The Ministry of Love is devoted to punishing people in terrible ways for minor things (as Winston is tortured for his crimes). The Ministry of Plenty causes (or presides over) poverty.
As far as humor, it's a personal opinion... I don't. But I don't find anything in the book humorous.