Question
Chemistry Question on p -Block Elements
It is possible to obtain oxygen from air by fractional distillation because
A
oxygen is in a different group of the periodic table from nitrogen
B
oxygen is more reactive than nitrogen
C
oxygen has higher boiling point than nitrogen
D
oxygen has a lower density than nitrogen
Answer
oxygen has higher boiling point than nitrogen
Explanation
Solution
Oxygen gas is prepared by fractional distillation
of air. During this process, dinitrogen with less
boiling point (78 K) distills as vapours while
dioxygen with higher boiling point (90 K) remains in
the liquid state and can be separated.