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NH(3) can be liquefied at ordinary tempe...

`NH_(3)` can be liquefied at ordinary temperature without the application of pressure. But `O_(2)` cannot be because :

A

its critical temperature is very high

B

its critical temperature is very low

C

its critical temperature is modrate

D

its critical temperature is higher than that of ammonia.

Text Solution

Verified by Experts

The correct Answer is:
B
Critical temperature of `O_(2)` is very low `(154.3 K)` while of `NH_(3)` is above the room temperature.
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CO_(2) gas can be liquefied under pressure between

The essential conditions for liquefaction of gases were discovered by Andrews in 1869 as a result of his study of pressure-volume-temperature relationship for CO_(2) . If was found that above a certain temperature, it was impossible to liquefy a gas whatever the pressure was applied. The temperature below which the gas can be liquefied by the application of pressure alone is called critical temperature (T_(c)) . The pressure required to liquefy a gas at this temperature is called the critical pressure (P_(c)) . The volume occupied by one mole of the substance at the critical temperature and pressure is called critcal volume. Critical constants are related with van der Waals' constant as follows: V_(c) = 3b, P_(c) = (a)/(27b^(2)), T_(c) = (8a)/(27 Rb) Gas A and can be liquefied at room temperature by applying pressure but gas B cannot. This reflects:

DINESH PUBLICATION-STATES OF MATTER : GASES AND LIQUIDS-Select the correct answer
  1. According to kinetic theory of gases in an ideal gas between two succ...

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  2. Critical temperature of a substance is defined as :

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  3. NH(3) can be liquefied at ordinary temperature without the application...

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  4. The constant 'a' in van der Waal's equation is maximum in

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  5. Which set of conditions represent the easiest way to cool a gas ?

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  6. The term which accounts for intermolecular force in van der Waal's equ...

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  7. As the temperature is raised from 20^(@)C to 40^(@)C the averge kineti...

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  8. In van der Waals' equation of state of the gas law the constnat 'b' is...

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  9. The volume of a certain mass of gas at N.T.P. is 27.5 cm^(3). What pre...

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  10. At 27^(@)C under one atmosphere pressure, a gas occupies a volume of V...

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  11. Hydrogen gas occupies a volume of 18 litres at 27^(@)C and under a pr...

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  12. what volume of hydrogen gas , at 273 K and 1 atm pressure will be con...

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  13. Which one of the following statement is not true about the effect of a...

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  14. Equal masses of methane and oxygen are mixed in an empty container at ...

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  15. The density of a gas a is twice that of gas B. Molecular mass of A is ...

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  16. At what temperature, the r.m.s. velocity of a gas measured at 50^(@)C ...

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  17. The compressibility factor for a real gas at high pressure is .

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  18. Mass of 112 cm^(3) of NH(3) gas at S.T.P. is

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  19. For gaseous state, if most probable speed is denoted by C^(**) average...

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  20. If Z is a compressibility factor, van der Waals' equation at low press...

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