Question

given the following information, what is the expected order of elution of the following four molecules (first to last):
a
bp: 81 °c
b
bp: 110 - 111 °c
c
bp: 144 - 145 °c
d
bp: 35 - 36 °c

o c, a, b, d
o b, c, a, d
o a, b, d, c
o b, d, c, a
o d, a, b, c

Explanation:

Step1: Understand elution principle

In gas - liquid chromatography (a common separation technique), the molecule with the lowest boiling point elutes first. The lower the boiling point, the more volatile the compound and the faster it will travel through the column.

Step2: Compare boiling points

We have boiling points: D (35 - 36°C) < A (81°C) < B (110 - 111°C) < C (144 - 145°C).

Answer:

D. A, B, C