11th Chemistry Monthly Test - 2 ( Gaseous State )

MABS Institution

11th Chemistry Monthly Test - 2 ( Gaseous State )-Aug 2020

Time : 2.30 Hours

Part - A

Multiple Choice Question - Answer All Question

Passenger aeroplane cabins is artificially pressurised since

pressure decreases with the increase in altitude
pressure increases with the increase in altitude
temperature increases with the increase in altitude
none of the above

Maximum deviation from ideal gas is expected from

CH₄(g)
NH₃ (g)
H₂(g)
N₂ (g)

The temperatures at which real gases obey the ideal gas laws over a wide range of pressure is called

Critical temperature
Boyle temperature
Inversion temperature
Reduced temperature

When an ideal gas undergoes unrestrained expansion, no cooling occurs because the molecules

are above inversion temperature
exert no attractive forces on each other
do work equal to the loss in kinetic energy
collide without loss of energy

Compression factor Z is given by _____________

PV/nRT
P/nRT
PV/R
PV/T

An ideal gas, obeying kinetic theory of gases cannot be liquefied, because

its critical temperature is above 0°C.
force acting between its molecules are negligible.
its molecules are relatively small in size.
it solidifies before becoming a liquid

Which of the following is a monoatomic gas in nature?

Oxygen
Hydrogen
Helium
Ozone

Which of the following pair will diffuse at the same rate?

CO₂ and N₂O
CO₂ and NO
CO₂ and CO
N₂O and NO

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

215216 Pa
13409 Pa
41648 Pa
31684 Pa

Which of the following is a diatomic gas in nature?

Oxygen
Ozone
Helium
Radon

Part - B

Generic 2 - Answer All Question

Define inversion temperature.

(i) Define critical temperature.
(ii) What is the critical temperature of CO₂ gas?

Identify the elements that are in gaseous state under normal atmospheric conditions.

(i) Define critical pressure.
(ii) What is the critical pressure of CO₂ gas?

Mention the units of pressure in SI units

State and explain Boyle's law. Represent the law graphically.

State Charles' law.

Part - C

Generic 3 - Answer All Question

It takes 192 sec for an unknown gas to diffuse through a porous wall and 84 sec for N₂ gas to effuse at the same temperature and pressure. What is the molar mass of the unknown gas?

Would it be easier to drink water with a straw on the top of Mount Everest?

When the driver of an automobile applies brake, the passengers are pushed toward the front of the car but a helium balloon is pushed toward back of the car. Upon forward acceleration the passengers are pushed toward the front of the car. Why?

Give the characteristics of gases.

Argon is an inert gas used in light bulbs to retard the vaporization of the tungsten filament. A certain light bulb containing argon at 1.2 atm and 18°C is heated to 85°C at constant volume. Calculate its final pressure in atm.

A sample of gas at 15°C at 1 atm. has a volume of 2.58 dm³. When the temperature is raised to 38°C at 1 atm does the volume of the gas increase? If so, calculate the final volume.

Mention the application of Dalton's law.

Part - D

Generic 5 - Answer All Question

If the weather balloon at a pressure 0.0965 atm. at ground level has a volume of 10.0 m³ What will be the pressure at an altitude of 5300 m where its volume is 20.0 m³?

Vanderwaal's constant for a gas (g) are a = 6.34 atm lit^-2; and b = 52.6 ml mol^-1. Find the critical temperature and critical pressure of the gas.

A mixture of He and O₂ were used in the 'air' tanks of underwater divers for deep dives. For a particular dive 12 dm³ of O₂ at 298 K, 1 atm. and 46 dm³ of He, at 298 K, 1 atm. were both pumped into a 5 dm³ tank. Calculate the partial pressure of each gas and the total pressure in the tank at 298K
An inflated balloon has a volume of 275 mL, and contains 0.120 mole of air. As shown in fig a piece of dry ice weighing 1 g is placed in the balloon and its neck is tied. What is the volume of the balloon after dry ice (solid CO₂) has vaporized? Assume pressure and temperature to remain constant.

A sample of gas has a volume of 3.8 dm3 at an unknown temperature. When the sample is submerged in ice water at 0 °C, its volume gets reduced to 2.27 dm3.· What is its initial temperature?

For a gaseous mixture of 2.41 g of helium and 2.79 g of neon in an evacuated 1.04 dm3 container at 298 K calculate the partial pressure of each gas and hence find the total pressure of the mixture.

The critical temperature of hydrogen gas is 33.2 °C and its critical pressure is 12.4 atm. Find out the values of a and b.

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11th Chemistry Monthly Test - 2 ( Gaseous State )

MABS Institution

11th Chemistry Monthly Test - 2 ( Gaseous State )-Aug 2020

Part - A

Multiple Choice Question - Answer All Question

Passenger aeroplane cabins is artificially pressurised since

Maximum deviation from ideal gas is expected from

The temperatures at which real gases obey the ideal gas laws over a wide range of pressure is called

When an ideal gas undergoes unrestrained expansion, no cooling occurs because the molecules

Compression factor Z is given by _____________

An ideal gas, obeying kinetic theory of gases cannot be liquefied, because

Which of the following is a monoatomic gas in nature?

Which of the following pair will diffuse at the same rate?

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

Which of the following is a diatomic gas in nature?

Part - B

Generic 2 - Answer All Question

Define inversion temperature.

(i) Define critical temperature. (ii) What is the critical temperature of CO2 gas?

Identify the elements that are in gaseous state under normal atmospheric conditions.

(i) Define critical pressure. (ii) What is the critical pressure of CO2 gas?

Mention the units of pressure in SI units

State and explain Boyle's law. Represent the law graphically.

State Charles' law.

Part - C

Generic 3 - Answer All Question

It takes 192 sec for an unknown gas to diffuse through a porous wall and 84 sec for N2 gas to effuse at the same temperature and pressure. What is the molar mass of the unknown gas?

Would it be easier to drink water with a straw on the top of Mount Everest?

When the driver of an automobile applies brake, the passengers are pushed toward the front of the car but a helium balloon is pushed toward back of the car. Upon forward acceleration the passengers are pushed toward the front of the car. Why?

Give the characteristics of gases.

Argon is an inert gas used in light bulbs to retard the vaporization of the tungsten filament. A certain light bulb containing argon at 1.2 atm and 18°C is heated to 85°C at constant volume. Calculate its final pressure in atm.

A sample of gas at 15°C at 1 atm. has a volume of 2.58 dm3. When the temperature is raised to 38°C at 1 atm does the volume of the gas increase? If so, calculate the final volume.

Mention the application of Dalton's law.

Part - D

Generic 5 - Answer All Question

If the weather balloon at a pressure 0.0965 atm. at ground level has a volume of 10.0 m3 What will be the pressure at an altitude of 5300 m where its volume is 20.0 m3?

Vanderwaal's constant for a gas (g) are a = 6.34 atm lit-2; and b = 52.6 ml mol-1. Find the critical temperature and critical pressure of the gas.

A mixture of He and O2 were used in the 'air' tanks of underwater divers for deep dives. For a particular dive 12 dm3 of O2 at 298 K, 1 atm. and 46 dm3 of He, at 298 K, 1 atm. were both pumped into a 5 dm3 tank. Calculate the partial pressure of each gas and the total pressure in the tank at 298K

An inflated balloon has a volume of 275 mL, and contains 0.120 mole of air. As shown in fig a piece of dry ice weighing 1 g is placed in the balloon and its neck is tied. What is the volume of the balloon after dry ice (solid CO2) has vaporized? Assume pressure and temperature to remain constant.

A sample of gas has a volume of 3.8 dm3 at an unknown temperature. When the sample is submerged in ice water at 0 °C, its volume gets reduced to 2.27 dm3.· What is its initial temperature?

For a gaseous mixture of 2.41 g of helium and 2.79 g of neon in an evacuated 1.04 dm3 container at 298 K calculate the partial pressure of each gas and hence find the total pressure of the mixture.

The critical temperature of hydrogen gas is 33.2 °C and its critical pressure is 12.4 atm. Find out the values of a and b.

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

(i) Define critical temperature.
(ii) What is the critical temperature of CO₂ gas?

(i) Define critical pressure.
(ii) What is the critical pressure of CO₂ gas?

It takes 192 sec for an unknown gas to diffuse through a porous wall and 84 sec for N₂ gas to effuse at the same temperature and pressure. What is the molar mass of the unknown gas?

A sample of gas at 15°C at 1 atm. has a volume of 2.58 dm³. When the temperature is raised to 38°C at 1 atm does the volume of the gas increase? If so, calculate the final volume.

If the weather balloon at a pressure 0.0965 atm. at ground level has a volume of 10.0 m³ What will be the pressure at an altitude of 5300 m where its volume is 20.0 m³?

Vanderwaal's constant for a gas (g) are a = 6.34 atm lit^-2; and b = 52.6 ml mol^-1. Find the critical temperature and critical pressure of the gas.

An inflated balloon has a volume of 275 mL, and contains 0.120 mole of air. As shown in fig a piece of dry ice weighing 1 g is placed in the balloon and its neck is tied. What is the volume of the balloon after dry ice (solid CO₂) has vaporized? Assume pressure and temperature to remain constant.