Question

The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is (a) nitrogen, oxygen, argon
(b) nitrogen, argon, oxygen
(c) argon, oxygen, nitrogen
(d) oxygen, argon, nitrogen

Answer 1

The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen is Nitrogen, Argon, Oxygen. So option B is correct.

Explanation:

1. Boiling point of liquid nitrogen is -195.8°C.

2. Boiling point of liquid argon is -185.8°C.

3. Boiling point of liquid oxygen is -183°C.

4. Increasing order of temperature is

   -195.8°C<-185.8°C<-185.8°C

5. In same sense we put element

   Nitrogen, Argon, Oxygen

Answer 2

Correct Order is Nitrogen, Argon and then Oxygen

Explanation:

• The boiling point of Liquid Nitrogen = - 190°C

So, It changes to gas, earlier, and then separates from the air.

Now, For Argon, Boiling point is - 186°C, so, leaves nitrogen for extraction.

Now, Oxygen, Boiling point = - 183°C, So, when argon gets extracted, we can collect oxygen.

• At low temperatures, nitrogen is found in Liquid State (LN2) and get produced in liquid air (Fractional Distillation).

• Liquid Nitrogen is a colorless, low viscosity.