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Standard XII

Chemistry

Liquefaction of Gases and Critical Constants

The gas with ...

Question

The gas with the highest critical temperature is

H_{2}

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H e

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N_{2}

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O_{2}

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C O_{2}

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Solution

The correct option is E $C O_{2}$
Critical temperature $(T)$ is the measure of intermolecular forces of attraction. The order of the critical temperature of the given gases is as
$\begin{matrix} T_{c} (K) \end{matrix} \begin{matrix} C O_{2} 304.2 K \end{matrix} \begin{matrix} > \end{matrix} \begin{matrix} O_{2} (154.3 K) \end{matrix} \begin{matrix} > \end{matrix} \begin{matrix} N_{2} (126.2 K) \end{matrix} \begin{matrix} > \end{matrix} \begin{matrix} H_{2} (33.2 K) \end{matrix} \begin{matrix} > \end{matrix} \begin{matrix} H e (5.2 K) \end{matrix}$

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Similar questions

Gases posses charcteristic critical temperature which depends upo the magnitude of intermolecular forces between the particles. Following are the critical temperatures of some gases.

$\begin{matrix} G a s e s & H_{2} & H e & O_{2} & N_{2} C r i t i c a l t e m p e r a t u r e i n K e l v i n & 33.2 & 5.3 & 154.3 & 126 \end{matrix}$

From the above data what would be the order of liquefaction of these gases? Start writing the order from the gas liquefying first

(a) $H_{2}, H e, O_{2}, N_{2}$ (b) $H e, O_{2}, H_{2}, N_{2}$

Q. Gases

H_{2} H e O_{2} N_{2}

Critical temperature(K) 33.2 5.3 154.3 126

From the above data what whould be the order of liquefaction of these gases?
Start writing the order from the gas liquefying first.

Q. The Van der waal's constant 'a' for gases

C H_{4}, N_{2}, N H_{3}

and

O_{2}

are 2.25, 1.39, 4.17 and 1.3

L^{2} a t m m o l^{- 2}

respectively. The gas which shows highest critical temperature is:

Q. The values of critical pressures

(P_{c})

and critical temperature

(T_{c})

for

O_{2}, C l_{2}, H_{2}

and he are given below The gas which has smallest value of van der Waal's constant 'b' is:

Name of the gas	$P_{c}$ $(N m^{- 2})$	$T_{c}$ (K)
$O_{2}$	$5 \times 10^{\circ}$	153
$C l_{2}$	$8 \times 10^{\circ}$	412
$H_{2}$	$1 \times 10^{\circ}$	33.9
$H_{e}$	$2 \times 10^{\circ}$	5.12

A gaseous mixture contain 1 gm of $H_{2},$ 4 gm of $H e$ 7gm of $N_{2}$ and 8gm of $O_{2}$ . The gas having the highest partial pressure is:

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The gas with the highest critical temperature is

The correct option is E CO2Critical temperature (T) is the measure of intermolecular forces of attraction. The order of the critical temperature of the given gases is asTc(K)CO2304.2K>O2(154.3K)>N2(126.2K)>H2(33.2K)>He(5.2K)