Why is nitrogen collected first during the fractional distillation of liquid air?

1. Air is a mixture of miscible components whose boiling points lie close together. 2. Simple distillation cannot separate them, so fractional distillation is used. 3. In fractional distillation the component with the lowest boiling point boils off first. 4. Nitrogen has a lower boiling point than the other main components of air, so it comes off first. 5. Density plays no part here, and melting point governs freezing rather than distillation. _Source: NECTA CSEE 2022 Chemistry 032, Question 1: Multiple Choice Items, item (x)_