Samacheer Kalvi solutions for Chemistry - Volume 1 and 2 [English] Class 11 TN Board chapter 6 - Gaseous State [Latest edition]

Gases deviate from ideal behavior at high pressure. Which of the following statement(s) is correct for non-ideality?

Rate of diffusion of a gas is

Which of the following is the correct expression for the equation of state of van der Waals gas?

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

Equal weights of methane and oxygen are mixed in an empty container at 298 K. The fraction of total pressure exerted by oxygen is

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

In a closed room of 1000 m³ a perfume bottle is opened up. The room develops a smell. This is due to which property of gases?

A bottle of ammonia and a bottle of HCl connected through a long tube are opened simultaneously at both ends. The white ammonium chloride ring first formed will be

The value of the universal gas constant depends upon

The value of the gas constant R is

Use of hot air balloon in sports and meteorological observation is an application of

The table indicates the value of van der Waals constant ‘a’ in (dm³)² atm. mol^-2

The gas which can be most easily liquefied is

Consider the following statements

i) Atmospheric pressure is less at the top of a mountain than at sea level

ii) Gases are much more compressible than solids or liquids

iii) When the atmospheric pressure increases the height of the mercury column rises

Select the correct statement

Compressibility factor for CO₂ at 400 K and 71.0 bar is 0.8697. The molar volume of CO₂ under these conditions is

If the temperature and volume of an ideal gas is increased to twice its values, the initial pressure P becomes

At identical temperature and pressure, the rate of diffusion of hydrogen gas is `3sqrt3` times that of a hydrocarbon having molecular formula C_nH_2n–2. What is the value of n?

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

The variation of volume V, with temperature T, keeping the pressure constant is called the coefficient of thermal expansion ie α = `1/"V"((∂"V")/(∂"T"))_"P"`. For an ideal gas α is equal to

Four gases P, Q, R and S have almost the same values of 'b' but their 'a' values (a, b are Van der Waals Constants) are in the order Q < R < S < P. At a particular temperature, among the four gases, the most easily liquefiable one is

Maximum deviation from ideal gas is expected from

The units of Van der Waals constants 'b' and 'a' respectively

Assertion: Critical temperature of CO₂ is 304 K, it can be liquefied above 304 K.

Reason: For a given mass of gas, volume is to directly proportional to pressure at constant temperature

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

Which of the following diagrams correctly describes the behaviour of a fixed mass of an ideal gas? (T is measured in K)

25 g of each of the following gases are taken at 27°C and 600 mm Hg pressure. Which of these will have the least volume?

State Boyle's law.

Name two items that can serve as a model for Gay Lusaac’s law and explain.

Give the mathematical expression that relates gas volume and moles.

What are ideal gases?

In what way real gases differ from ideal gases.

Can a Van der Waals gas with a = 0 be liquefied? explain.

Suppose there is a tiny sticky area on the wall of a container of gas. Molecules hitting this area stick there permanently. Is the pressure greater or less than on the ordinary area of walls?

Explain the following observation.

Aerated water bottles are kept under water during summer

Explain the following observation.

Liquid ammonia bottle is cooled before opening the seal

Explain the following observation.

The type of an automobile is inflated to slightly lesser pressure in summer than in winter

Explain the following observation.

The size of a weather balloon becomes larger and larger as it ascends up to larger altitude

Give a suitable explanation for the following facts about gases.

Gases don’t settle at the bottom of a container

Give a suitable explanation for the following facts about gases.

Gases diffuse through all the space available to them

Suggest why there is no hydrogen (H₂) in our atmosphere. Why does the moon have no atmosphere?

Explain whether a gas approaches ideal behavior or deviates from ideal behaviour if it is compressed to a smaller volume at a constant temperature.

Explain whether a gas approaches ideal behavior or deviates from ideal behaviour if the temperature is raised while keeping the volume constant.

Explain whether a gas approaches ideal behavior or deviates from ideal behaviour if more gas is introduced into the same volume and at the same temperature.

Which of the following gases would you expect to deviate from ideal behavior under conditions of low-temperature F₂, Cl_2, or Br₂? Explain.

Distinguish between diffusion and effusion.

Aerosol cans carry a clear warning of the heating of the can. Why?

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

Write the Van der Waals equation for a real gas. Explain the correction term for pressure and volume.

Derive the values of critical constants in terms of van der Waals constants.

Why do astronauts have to wear protective suits when they are on the surface of the moon?

When ammonia combines with HCl, NH₄Cl is formed as white dense fumes. Why do more fumes appear near HCl?

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.

A sample of gas has a volume of 8.5 dm³ at an unknown temperature. When the sample is submerged in ice water at 0°C, its volume gets reduced to 6.37 dm³. What is its initial temperature?

Of two samples of nitrogen gas, sample A contains 1.5 moles of nitrogen in a vessel of the volume of 37.6 dm³ at 298 K, and sample B is in a vessel of volume 16.5 dm³ at 298 K. Calculate the number of moles in sample B.

Sulphur hexafluoride is a colourless, odourless gas; calculate the pressure exerted by 1.82 moles of the gas in a steel vessel of volume 5.43 dm³ at 69.5 °C, assuming ideal gas behaviour

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 small bubble rises from the bottom of a lake where the temperature and pressure are 6°C and 4 atm. to the water surface, where the temperature is 25°C and pressure is 1 atm. Calculate the final volume in (mL) of the bubble, if its initial volume is 1.5 mL.

Hydrochloric acid is treated with a metal to produce hydrogen gas. Suppose a student carries out this reaction and collects a volume of 154.4 × 10⁻³ dm³ of a gas at a pressure of 742 mm of Hg at a temperature of 298 K. What mass of hydrogen gas (in mg) did the student collect?

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 tank contains a mixture of 52.5 g of oxygen and 65.1 g of CO₂ at 300 K the total pressure in the tanks is 9.21 atm. Calculate the partial pressure (in atm.) of each gas in the mixture.

A combustible gas is stored in a metal tank at a pressure of 2.98 atm at 25°C. The tank can withstand a maximum pressure of 12 atm after which it will explode. The building in which the tank has been stored catches fire. Now predict whether the tank will blow up first or start melting? (Melting point of the metal = 1100 K).