Subject :NSO Class : Class 9
The boiling points of a few gases found in air are given below :
If liquid mixture is fractionally distilled, the order of gases distilling out is
A Krypton, Neon, Nitrogen, Oxygen
B Neon, Nitrogen, Oxygen, Krypton
C Nitrogen, Neon, Oxygen, Krypton
D Oxygen, Neon, Nitrogen, Krypton.
Ans 1: (Master Answer)
Class : Class 1
The correct answer is B
The gas having lowest boiling point i.e., highly volatile will be distilled out first and the gas having highest boiling point i.e., least volatile will be distilled out at the last. So, the correct order of gases distilling out is neon, nitrogen, oxygen, krypton.
Ans 2:
Class : Class 9
Option b