Question

Air is a mixture of 21% oxygen, 78% nitrogen, and approximately 1% other trace gases, primarily argon(0.93%). Being cheap and simple to use, it is the most common diving gas. As its nitrogen component causes nitrogen narcosis, it is considered to have a safe depth limit of about 40 metres (130 feet) for most divers. Liquid air is an extremely cold liquid in which all the constituent gases are in a liquid state. Liquid air is obtained by repeated compression, cooling, and expansion of air. We can separate different components of liquid air by fractional distillation. The increasing order of boiling points of argon, oxygen and nitrogen is Nitrogen A. Name the gas that boils off first during fractional distillation of liquid air.
B. Name the gas that boils off at the last during the fractional distillation of
liquid air.
C. What should be the difference in boiling points of two components of a
liquid-liquid mixture to choose fractional distillation as a separation
technique?

(a) A- Nitrogen B- Oxygen C- more than 25K
(b) A- Nitrogen B- Oxygen C- Less than 25K
(c) A- Oxygen B- Nitrogen C- more than 25K
(d) A- Oxygen B- Nitrogen C- less than 25K

Answer 1

Answer:

(c) A- Oxygen B- Nitrogen C- more than 25K

Explanation:

BTS ARMY FOREVER

Answer 2

Answer:

(c) A- Oxygen B- Nitrogen C- more than 25K

is right