States of Matter

Which amongst the following options is correct graphical representation of Boyle's law?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Which one is not correct mathematical equation for Dalton's Law of partial pressure? Here p = total pressure of gaseous mixture where pi = partial pressure of ith gas i = mole fraction of ith gas in gaseous mixture pi = pressure of ith gas in pure state

1. p = p1 + p2 + p3
2. p = n1 RTV + n2 RTV + n3 RTV
3. pi = i p
4. pi = i pi

A 10.0 L flask contains 64 g of oxygen at 27 C. (Assume O2 gas is behaving ideally). The pressure inside the flask in bar is (Given R = 0.0831 L bar K-1 mol-1)

1. 2.5
2. 498.6
3. 49.8
4. 4.9

A vessel contains 3.2 g of dioxygen gas at STP (273.15 K and 1 atm pressure). The gas is now transferred to another vessel at constant temperature, where pressure becomes one third of the original pressure. The volume of new vessel in L is : (Given : molar volume at STP is 22.4 L)

1. 67.2
2. 6.72
3. 2.24
4. 22.4

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. [figure]
2. [figure]
3. [figure]
4. [figure]

Choose 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. 26.02
2. 2.518
3. 2.602
4. 25.18

A mixture of N2 and Ar gases in a cylinder contains 7 g of N2 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 N2 is : [Use atomic masses (in g mol-1) : N = 14, Ar = 40]

1. 12 bar
2. 15 bar
3. 18 bar
4. 9 bar

Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?

1. 3/8
2. 1/2
3. 1/8
4. 1/4

What is the density of N2 gas at 227 C and 5.00 atm pressure? (R = 0.082 L atm K-1 mol-1)

1. 1.40 g/L
2. 2.81 g/L
3. 3.41 g/L
4. 0.29 g/L

A certain gas takes three times as long to effuse out as helium. Its molecular mass will be

1. 27 u
2. 36 u
3. 64 u
4. 9 u

50 mL of each gas A and of gas B takes 150 and 200 seconds respectively for effusing through a pin hole under the similar conditions. If molecular mass of gas B is 36, the molecular mass of gas A will be

1. 96
2. 128.74
3. 20.25
4. 64.42

A bubble of air is underwater at temperature 15 and the pressure 1.5 bar. If the bubble rises to the surface where the temperature is 25 and the pressure is 1.0 bar, what will happen to the volume of the bubble?

1. Volume will become greater by a factor of 1.6.
2. Volume will become greater by a factor of 1.1.
3. Volume will become smaller by a factor of 0.70.
4. Volume will become greater by a factor of 2.5.

Two gases A and B having the same volume diffuse through a porous partition in 20 and 10 seconds respectively. The molecular mass of A is 49 u. Molecular mass of B will be

1. 50.00 u
2. 12.25 u
3. 6.50 u
4. 25.00 u

A gaseous mixture was prepared by taking equal moles of CO and N2. If the total pressure of the mixture was found to be 1 atmosphere, the partial pressure of the nitrogen (N2) in the mixture is

1. 0.5 atm
2. 0.8 atm
3. 0.9 atm
4. 1 atm

The pressure exerted by 6.0 g of methane gas in a 0.03 m3 vessel at 129 is (Atomic masses : C = 12.01, H = 1.01 and R = 8.314 J K-1 mol-1)

1. 215216 Pa
2. 13409 Pa
3. 41648 Pa
4. 31684 Pa