EASY

Earn 100

Number of molecules in 100 mL of each of $O_{2}$ , $N H_{3}$ and $C O_{2}$ at STP are in the order:

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Important Questions on Atoms and Molecules

HARD

Science>Chemistry>Atoms and Molecules>The Gas Laws

Two closed bulbs of equal volume

(V)

containing an ideal gas initially at pressure

p_{i}

and temperature

T_{1}

are connected through a narrow tube of negligible volume, as shown in the figure below. The temperature of one of the bulbs is then raised to

T_{2} .

The final pressure

P_{f}

is:

EASY

Science>Chemistry>Atoms and Molecules>The Gas Laws

In a closed vessel, an ideal gas at

1 atm

is heated from

27^{o} C to 327^{o} C

, the final pressure of the gas will approximately be

MEDIUM

Science>Chemistry>Atoms and Molecules>The Gas Laws

The density of acetic acid vapour at

300 K

and

1 atm

5 mg {cm}^{- 3}

. The number of acetic acid molecules in the cluster that is formed in the gas phase is closest to

MEDIUM

Science>Chemistry>Atoms and Molecules>The Gas Laws

What is the density of water vapour at boiling point of water?

EASY

Science>Chemistry>Atoms and Molecules>The Gas Laws

At constant pressure, the volume of a fixed mass of a gas varies as a function on temperature as shown in the graph

Question Image

The volume of the gas at $300 ° C$ is larger than that at $0 ° C$ by a factor of

EASY

Science>Chemistry>Atoms and Molecules>The Gas Laws

The value of 1 mole of any pure ideal gas at standard temperature and pressure is always equal to

EASY

Science>Chemistry>Atoms and Molecules>The Gas Laws

300 K

, the density of a certain gaseous molecule at

2

bar is double to that of dinitrogen

(N_{2})

4

bar. The molar mass of the gaseous molecule is

EASY

Science>Chemistry>Atoms and Molecules>The Gas Laws

A spherical balloon of radius

3 cm

containing helium gas has a pressure of

48 \times 10^{- 3}

bar. At the same temperature, the pressure, of a spherical balloon of radius

12 cm

containing the same amount of gas will be

\dots \dots \dots \dots . \times 10^{- 6}

bar.

EASY

Science>Chemistry>Atoms and Molecules>The Gas Laws

An ideal gas has pressure

P

, volume

V

and absolute temperature

T

. If

m

is the mass of each molecule and

K

is the Boltzmann constant then density of the gas is

EASY

Science>Chemistry>Atoms and Molecules>The Gas Laws

10 moles of a mixture of hydrogen and oxygen gases at a pressure of 1 atm at a constant volume and temperature, react to form 3.6 g of liquid water. The pressure of the resulting mixture will be closest to:

MEDIUM

Science>Chemistry>Atoms and Molecules>The Gas Laws

A mixture of gases

O_{2}, H_{2}

and

C O

are taken in a closed vessel containing charcoal. The graph that represents the correct behaviour of pressure with time is:

MEDIUM

Science>Chemistry>Atoms and Molecules>The Gas Laws

An open vessel at

27^{o} C

is heated until two fifth of the air (assumed as an ideal gas) in it has escaped from the vessel. Assuming that the volume of the vessel remains constant, the temperature to which the vessel has been heated is:

EASY

Science>Chemistry>Atoms and Molecules>The Gas Laws

Which of the following equations does NOT represent Charles’s law for a given mass of gas at constant pressure?

EASY

Science>Chemistry>Atoms and Molecules>The Gas Laws

Equal masses of

H_{2}, O_{2}

and methane have been taken in a container of volume

V

at temperature

27^{o} C

in identical conditions. The ratio of the volumes of gases

H_{2} : O_{2} :

methane would be

HARD

Science>Chemistry>Atoms and Molecules>The Gas Laws

Which one of the following graphs is not correct for ideal gas?

$d =$ Density, $P =$ Pressure, $T =$ Temperature

Question Image

MEDIUM

Science>Chemistry>Atoms and Molecules>The Gas Laws

The minimum pressure required to compress

600 {dm}^{3}

of a gas at

1

bar to

150 {dm}^{3}

40 ° C

HARD

Science>Chemistry>Atoms and Molecules>The Gas Laws

Aluminium reacts with sulfuric acid to form aluminium sulfate and hydrogen. What is the volume of hydrogen gas in liters

(L)

produced at

300 K

and

1.0

atm pressure, when

5.4 g

of aluminium and

50.0 mL

5.0 M

sulfuric acid are combined for the reaction? (Use molar mass of aluminium as

27.0 g {mol}^{- 1}

R = 0.082 atm L {mol}^{- 1} K^{- 1}

)

MEDIUM

Science>Chemistry>Atoms and Molecules>The Gas Laws

At a constant pressure P, the plot of volume (V) as a function of temperature (T) for 2 moles of an ideal gas gives a straight line with a slope

0.328 L . K^{- 1}

. The value of P (in atm) is closest to

[Gas constant,

R = 0.0821 L a t m m o l^{- 1} K^{- 1}

]

MEDIUM

Science>Chemistry>Atoms and Molecules>The Gas Laws

Assuming ideal gas behavior, the ratio of density of ammonia to that of hydrogen chloride at same temperature and pressure is: (Atomic weight of Cl is 35.5 u)

MEDIUM

Science>Chemistry>Atoms and Molecules>The Gas Laws

The volume of gas $A$ is twice than that of gas $B$ . The compressibility factor of gas $A$ is thrice than that of gas $B$ at same temperature. What are the pressures of the gases for equal number of moles?

Number of molecules in 100 mL of each of O2, NH3 and CO2 at STP are in the order:

Important Questions on Atoms and Molecules

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Number of molecules in 100 mL of each of $O_{2}$ , $N H_{3}$ and $C O_{2}$ at STP are in the order: