An open flask containing air is heated from 300 K to 500 K. The percentage of air that will escape into the atmosphere if pressure is kept constant is-

1. 80

2. 40

3. 60

4. 20

V versus T curves at constant pressure P₁ and P₂ for an ideal gas are as shown in the figure. The correct statement is-

1. P₁>P₂

2. P₁<P₂

3. P₁=P₂

4. All of the above

The kinetic energy for 14 grams of nitrogen gas at 127°C is nearly -

(mol. mass of nitrogen = 28 and gas constant = 8.31JK^–1mol^–1) 

1. 1.0 J

2. 4.15 J

3. 2493 J

4. 3.3 J

A mixture of CO and CO₂ is found to have a density  1.5 g/litre at 30^oC and 730 mm. The composition of the mixture is-

1. CO: 44%; CO₂ = 56%

2. CO: 32%; CO₂ = 68%

3. CO: 70%; CO₂ = 30%

4. CO: 9%; CO₂ = 91%

A collapsed polythene bag of 30 litre capacity is partially blown up by the addition of 10 litre of N₂ at 0.965 atm at 298 K. Subsequently,  enough O₂  is pumped into bag so that at 298 K and external pressure of 0.990 atm, the bag contains full 30 litre. The final pressure of O₂ in the following experiment is-

If density of vapours of a substance of molar mass 18 g/mole at 1 atm pressure and 500 K is

0.36 kg m^–3 , then the value of Z for the vapours is-

(R = 0.082 L atm mole K^–1)

1. $\frac{41}{50}$

2. $\frac{50}{41}$

3. 1.1

4. 0.9

The graph that represents an isobar $\left(\frac{\mathrm{nR}}{\mathrm{p}}\mathrm{\hspace{0.17em}}>\mathrm{\hspace{0.17em}1}\right)$ is-

1.  

2. 

3. 

4.  

Flask A of volume 10 litre containing 20 gram of H₂ and flask B of volume 10 litre containing 88 gram CO₂ are connected by a connector having negligible volume. When the valve of the connector is opened, the composition of H₂ gas in flask B after opening the valve is-

1. 10%

2. 13%

3. 15%

4. 20%

At a certain temperature for which RT = 25 lit. atm. mol^–1, the density of a gas, in gm lit^–1, is d = 2.00P + 0.020 P², where P is the pressure in atmosphere. The molecular weight of the gas in gm mol^–1 is-

1. 25

2. 50

3. 75

4. 100

A mixture of carbon monoxide and carbon dioxide is found to have a density of 1.7 g/L at S.T.P. The mole fraction of carbon monoxide is-

1. 0.37

2. 0.40

3. 0.30

4. 0.50