Which of the following is not correct about postulates of kinetic molecular theory of gases?

At 300 K, 250 mL of gas A at 1 bar pressure is mixed with 500 mL of a gas B at 2 Bar pressure in a 1.0 L flask. Gas A does not react with gas B. The final pressure of the mixture is-
1. 1.00 bar 
2. 2.15 bar 
3. 2.50 bar 
4. 1.25 bar 

Choose the correct option for graphical representation of Boyle's law, which shows a graph of pressure vs. volume of a gas at different temperatures :

1. 

2. 

3. 

4. 

The correct option for the total pressure (in atm) in a mixture of 4 g O₂ and 2 g H₂ confined in a total volume of one litre at 0$°$C is :
[Given R=0.082 L atm mol^-1 K^-1, T=273 K]

1. 25.18

2. 26.02

3. 2.518

3. 2.602

A mixture of ${\mathrm{N}}_2$ and Ar gases in a cylinder contains 7 g of ${\mathrm{N}}_2$ and 8 g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of ${\mathrm{N}}_2$ is:

[Use atomic masses (in g ${\mathrm{mol}}^{-1}$): N=14, Ar=40]

1. 12 bar

2. 15 bar

3. 18 bar

4. 9 bar

The minimum pressure required to compress 600 dm³ of a gas at 1 bar to 150 dm³ at 40°C is

1. 4.0 bar

2. 0.2 bar

3. 1.0 bar

4. 2.5 bar

A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is:

1.  Z<1 and repulsive forces are dominant

2.  Z>1 and attractive forces are dominant

3.  Z>1 and repulsive forces are dominant

4.  Z<1 and attractive forces are dominant

In water-saturated air, the mole fraction of water vapor is 0.02. If the total pressure of the saturated air is 1.2 atm, the partial pressure of dry air is-

1. 1.17 atm

2. 1.76 atm

3. 1.27 atm

4.  0.98 atm