What is the title of Queen's 1975 single that features an operatic section?

Queen’s 1975 single featuring an operatic section is “Bohemian Rhapsody.”

Written by Freddie Mercury, the song appeared as the lead single from Queen’s fourth studio album, A Night at the Opera. Instead of following a standard verse-and-chorus structure, it unfolds as a six-minute suite combining an introduction, ballad, operatic passage, hard-rock section, and reflective coda.

The operatic middle was created through extensive multitracking. Queen recorded numerous vocal parts to produce the dense choral effect, while producer Roy Thomas Baker helped shape the ambitious studio production. Mercury reportedly described the composition as a “mock opera,” reflecting its deliberately dramatic and unconventional design.

Although its length and structure initially challenged normal radio expectations, the single became a major international success. Its promotional video, released in 1975, is also widely credited with helping popularise the modern music video format. The song is distinct from “Killer Queen,” another theatrical Queen hit, but only “Bohemian Rhapsody” contains the famous operatic sequence.