The volume occupied by 4.75 g of acetylene gas at 50 °C and 740 mmHg pressure is-  

[Given R = 0.0826 L atm K^–1 mol^–1]

1. 6 L

2. 5 L

3. 8 L

4. 10 L

3.12 g of oxygen is adsorbed on 1.2 g of platinum metal. The volume of oxygen adsorbed per gram of the

adsorbent at 1 atm and 300 K in L is:

[R = 0.0821 L atm K^–1 mol^–1]

1. 4 L

2. 3 L

3. 1 L

4. 2 L

A car tyre is filled with nitrogen gas at 35 psi at 27 °C. It will burst if pressure exceeds 40 psi. The temperature in °C at which the car tyre will burst is-

(Rounded-off to the nearest integer)
(Hint: psi is unit of pressure)

1. 65

2. 70

3. 75

4. 77

Among the following, the graph not correctly representing an ideal gas is:

d = Density , P = Pressure, T = Temperature 

1.  II
2.  III
3.  I
4.  IV

A mixture of one mole of H₂, He, and O₂ each are enclosed in a cylinder of volume V at temperature T. If the partial pressure of H₂ is 2 atm, the total pressure of the gases in the cylinder is-
1. 14 atm
2. 22 atm
3. 38 atm
4. 6 atm

Consider the van der Waals constants, a and b, for the following gases.
       Gas                     Ar            Ne       Kr     Xe
a/(atm dm⁶ mol^–2)      1.3          0.2      5.1    4.1
b/(10^–2dm³ mol^–1)      3.2          1.7      1.0    5.0
Which gas is expected to have the highest critical temperature?

1.  Xe

2.  Ne

3.  Kr 

4.  Ar