Arrange the steps involved in obtaining oxygen gas from air.
1. Liquify air by increasing the pressure and decreasing the temperature.
2. Collect the liquid oxygen in a jar.
3. $C O_{2}$ separates out as dry ice.
4. Separate nitrogen gas through a fractionating column.

1 \to 3 \to 2 \to 4

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2 \to 4 \to 1 \to 3

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4 \to 1 \to 3 \to 2

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1 \to 3 \to 4 \to 2

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Solution

The correct option is D $1 \to 3 \to 4 \to 2$
The following steps are involved to obtain oxygen from air through fractional distillation:

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Q. Arrange the steps involved in obtaining oxygen gas from air.
1. Liquify air by increasing the pressure and decreasing the temperature.
2. Collect the liquid oxygen in a jar.
3.

C O_{2}

separates out as dry ice.
4. Separate nitrogen gas through a fractionating column.

Q. Mark the statement which is included in the process of separating oxygen gas from air.
(I) All other gases are separated from air.
(II) The air is compressed by increasing the pressure.
(III) The air is cooled by decreasing the temperature to get liquid air.

Fractional distillation is the separation of a mixture into its component or fractions. This process is based on difference in boiling point of the components in the mixture. This is a special type of distillation.

Air is a homogeneous mixture of 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases such as helium, krypton, nitrogen dioxide etc.

Consider three gases oxygen, nitrogen and argon whose boiling points are: -183, -196, -186 degree celsius. They are to be separated from air using fractional distillation.

Air is compressed by increasing pressure and is then cooled by decreasing the temperature to form liquid air. This liquid air is allowed to warm-up slowly in a fractional distillation column, where gases get separated at different heights depending upon their boiling points. As the height of tower increases the temperature increases.

__ is the gas collected in least volume.

Q. Oxygen,argon and nitrogen boils at -183 ℃, -185.8 ℃ and -195.8 ℃ respectively. Answer the following questions:
(a) Arrange the gasses in the increasing value of boiling point.
(b) Which gas liquified first on cooling?
(c) Which gas is separated first when the liquid air is warmed up?

Q. (a) Explain how, nitrogen , oxygen and argon gases are separated from air.
(b) Draw a flow diagram of the processes involved in obtaining gases like nitrogen, oxygen and argon from air.

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Arrange the steps involved in obtaining oxygen gas from air. 1. Liquify air by increasing the pressure and decreasing the temperature. 2. Collect the liquid oxygen in a jar. 3. CO2 separates out as dry ice. 4. Separate nitrogen gas through a fractionating column.

The correct option is D 1→3→4→2The following steps are involved to obtain oxygen from air through fractional distillation:

Arrange the steps involved in obtaining oxygen gas from air.
1. Liquify air by increasing the pressure and decreasing the temperature.
2. Collect the liquid oxygen in a jar.
3. $C O_{2}$ separates out as dry ice.
4. Separate nitrogen gas through a fractionating column.

The correct option is D $1 \to 3 \to 4 \to 2$
The following steps are involved to obtain oxygen from air through fractional distillation: