A gaseous mixture contains 56 g of N₂, 44 g of CO₂ and 16 g of CH₄. The total pressure of the mixture is 720 mm Hg. The partial pressure of CH₄ is-

1. 180 mm

2. 360 mm

3. 540 mm

4. 720 mm

The partial pressure of oxygen in a flask containing 16 g ${\mathrm{O}}_2$ and 32 g ${\mathrm{SO}}_2$ is-

1. 1/16 of total pressure

2. 1/2 of total pressure

3. 2/3 of total pressure

4. None of the above

In a flask of volume V litres, 0.2 mol of oxygen, 0.4 mol of nitrogen, 0.1 mol of ammonia and 0.3 mol of helium are enclosed at ${27}^{o}C$. If the total pressure exerted by these non-reacting gases is one atmosphere, the partial pressure exerted by nitrogen is-

1. 1 atm

2. 0.1 atm

3. 0.2 atm

4. 0.4 atm

Equal weights of ethane and hydrogen gas are mixed in an empty container at $25°\mathrm{C}$. The fraction of total pressure exerted by hydrogen is-

1. 1: 2

2. 1: 1

3. 1: 16

4. 15: 16

The partial pressure of H₂ in a flask containing 2 g of H₂, 14 g of N_2, and 16 g of O₂ is-

1. 1/2 of the total pressure

2. 1/3 of the total pressure

3. 1/4 of the total pressure

4. 1/16 of the total pressure

Which among the following mixtures of gases at room temperature does not obey Dalton's law of partial pressure-

1. He and O₂

2. NH₃ and HCl

3. H₂ and He

4. N₂ and He

Equal weights of methane and oxygen are mixed in an empty container at 25°C. The fraction of the total pressure exerted by oxygen is- 

1. 1/3

2. 1/2

3. 2/3

4. $\frac{1}{3}\times \frac{273}{298}$  

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

At STP, a container has 1 mole of He, 2 moles Ne, 3 moles of $O_2$, and 4 moles ${\mathrm{N}}_2$. Without changing total pressure if 2 moles of ${\mathrm{O}}_2$ is removed, the partial pressure of ${\mathrm{O}}_2$ will be decreased by-

1. 26 %

2. 40 %

3. 58.33 %

4. 66.66 %

The pressure of a 1 : 4 mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere. The partial pressure of dioxygen is-

1. $0.8\times {10}^5$ $\mathrm{atm}$

2. $0.008$ ${\mathrm{Nm}}^{-2}$

3. $8\times {10}^4$ ${\mathrm{Nm}}^{-2}$

4. $0.25$ $\mathrm{atm}$