Gaseous State

Q.

Why do gases exert pressure?

1. Particles of gases hit each other.

2. Particles of gases hit the walls of the container.

3. Particles of gases are highly compressible.

4. Gas particles have high intermolecular forces of attraction.

Q.

An inflated air balloon collapsed when pricked with a pin. Which state and property is shown by this observation?

Q.

Which gas has more diffusion rate?

1. ${\mathrm{H}}_2$

2. ${\mathrm{N}}_2$

3. ${\mathrm{O}}_2$

Q. The volume of 2.8 g of carbon monoxide at ${27}^{\circ }C$ and $0.821$ atm pressure is $(R=0.0821lit.atmmo{l}^{–1}{K}^{–1})$

1. $30L$
2. $3L$
   
3. $0.3L$
4. $1.5L$

Q. If two moles of an ideal gas at 546 K has volume 44.8 litres, then its pressure is

1. 
   4 atm
2. 
   3 atm
3. 
   2 atm
4. 
   1 atm

Q. On converting ${25}^{\circ }C,{38}^{\circ }Cand{66}^{\circ }C$
to Kelvin scale, the correct sequence of temperature will be

1. 
   298 K, 311 K and 339 K
2. 
   298 K, 300 K and 338 K
3. 
   273 K, 278 K and 543 K
4. 
   298 K, 310 K and 338 K

Q.

Why do gases exert more pressure on the walls of the container than the solids?

Q.

Name two gases which are supplied in compressed form in homes and hospitals.

Q. Hydrogen gas diffuses six times faster than gas A. The molar mass of gas A is ______ g/mol.

1. 
   72
2. 
   6
3. 
   24
4. 
   36

Q.

Consider one mole of helium gas enclosed in a container at initial pressure $P_1$ and volume $V_1$. It expands isothermally to volume $4V_1$. After this, the gas expands adiabatically and its volume becomes $32V_1$. The work done by the gas during isothermal and adiabatic expansion processes are $W_{iso}$ and $W_{adia}$, respectively. If the ratio $\raisebox{1ex}{$W_{iso}$}\!\left/ \!\raisebox{-1ex}{$W_{adia}=f\ln 2$}\right.$, then $f$ is ________.

Q.

What is the binding force between molecules of a substance in a gas under ordinary conditions of temperature and pressure

Q. Gases are more compressible than solids and liquids.

1. True
2. False

Q.

Perform an activity to understand the characteristics of gases.

Q.

1. Intermolecular space is maximum in gases.

1. True
2. False

Q.

Unknown gas diffuses with ${\mathrm{CO}}_2$ .The rate of diffusion of an unknown gas is double than that of ${\mathrm{CO}}_2$. The molecular weight of the unknown gas is ?

Q. If the absolute temperature of a gas having volume $Vc{m}^3$ is doubled and the pressure is reduced to half, the final volume will be

1. 
   $0.25V$
2. 
   $0.50V$
3. 
   $2V^2$
4. 
   $4V$

Q. Helium gas at 300 K is shifted from a vessel of $250c{m}^3$ to a vessel of $1L$ capacity. The pressure of gas will

1. 
   become four times
2. 
   become double
3. 
   decrease to half of the original value
4. 
   decrease to one-fourth the original value

Q. The pressure and temperature of 4 $d{m}^3$ of $C{O}_2$ gas are doubled. Then the volume of $C{O}_2$ gas would be

1. 
   $2d{m}^3$
2. 
   $3d{m}^3$
3. 
   $4d{m}^3$
4. 
   $8d{m}^3$

Q.

Identify whether the statement is true or false:

The term “vapour” represents the gaseous state of a substance that exists as a liquid or solid.

1. True
2. False

Q. If the rate of diffusion of A is 5 times that of B, what will be the density ratio of A and B?

1. 
   $1/25$
2. 
   $1/5$
3. 
   $125$
4. 
   $5$

Q.

Why is Daltons Law Important?

Q.

Write the full forms of the following :

(a) LPG

(b) CNG

Q. Consider the following statements.
Statement-1: The gas which follows the ideal gas equation at all ranges of temperature and pressure is called real gas.
Statement-2: All gases follow ideal gas equation at high pressure and low temperature.
Now, choose the correct option.

1. Only statement-1 is correct
2. Only statement-2 is correct
3. Both the statements are correct
4. Both the statements are incorrect

Q.

Write the value of zero on the Kelvin scale.

Q.

The ratio of rates of diffusion of two gases X and Y is $4:\sqrt{11}$ .If the molecular mass of Y is double to the molecular mass of oxygen, then X is

1. CO

2. SO₃

3. CO₂

4. NO

Q. All of the following are gases and not vapour, except

1. Nitrogen
2. Oxygen
3. Polar aurorae
4. Steam

Q. Statement: Water vapour causes more burning sensation than boiling water at the same temperature.
Reason: Water vapour has more energy than boiling water due to the latent heat of vaporization.

1. Both the statement and the reason are true and the reason is the correct explanation.
2. Both the statement and reason are true but the reason is not the correct explanation.
3. The statement is true but the reason is false.
4. The statement is false but the reason is true.

Q. Applying pressure increases the distance between the particles of matter.

1. True
2. False

Q.

The Pressure-Volume relationship is given by ________

Q.

What is the molar volume of a gas at STP condition?