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Liquefaction of Gases and Critical Constants

Liquid nitrog...

Question

Liquid nitrogen is in vapour form, so why it is given the name liquid nitrogen and not vapour nitrogen?

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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

Q. A liquid-nitrogen container is made of a 1 cm thick styrofoam sheet having thermal conductivity 0.025 J s⁻¹ m⁻¹ °C⁻¹. Liquid nitrogen at 80 K is kept in it. A total area of 0.80 m² is in contact with the liquid nitrogen. The atmospheric temperature us 300 K. Calculate the rate of heat flow from the atmosphere to the liquid nitrogen.

Q. A sample of nitrogen gas is bubbled through liquid water at

25^{o} C

and then collected in a volume of

750 c c

. The total pressure of the gas which is saturated with water vapour, is found to be

740 m m

25^{o} C

. The vapour pressure of water at this temperature is

24 m m

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Q. Oxides of nitrogen and sulphur form when they react with water vapour present in atmosphere.

Q. Oxides of nitrogen and sulphur form when they react with water vapour present in the atmosphere.

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Liquefaction of Gases and Critical Constants

Standard XII Chemistry

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