Gaseous States Test

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Gaseous States Test - 8

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Weekly Quiz Competition

Question 1
1 / -0

Which one of the following statements is wrong for gases?

A
Gases do not have a definite shape and volume

B
Volume of the gas is equal to volume of container confining the gas

C
Confined gas exerts uniform pressure on the walls of its container in all directions

D
Mass of gas cannot be determined by weighing a container in which it is enclosed

Solution

Mass of gas can be determined by weighing a container in which it is enclosed as follows:
Mass of the gas = mass of the cylinder including gas - mass of empty cylinder
So, it is a wrong statement.
Question 2
1 / -0

Gas equation PV = nRT is obeyed by

A
only isothermal process

B
only adiabatic process

C
Both(A) and (B)

D
None of these.

Solution

General gas equation PV = nRT is obeyed both for isothermal and adiabatic processes.
Question 3
1 / -0

At STP, 0.50 mole H₂ gas and 1.0 mole He gas

A
have equal average kinetic energies

B
have equal molecular speeds

C
occupy equal volumes

D
have equal effusion rates

Solution

Average kinetic energy of a gaseous molecule is given by

E_k= 3/2 nRT

The kinetic energy of gas molecule depends on temperature and number of moles.

Rate of effusion ∝ 1/√M

So, rate of effusion are equal.
Question 4
1 / -0

Which of the following exhibits the weakest intermolecular forces?

A
He

B
HCl

C
NH₃

D
H₂O

Solution

Helium is a noble gas. Weak van der Waal's forces operate between the gaseous molecules of helium. In NH₃, H₂O and HCl, there is strong hydrogen bonding between the molecules.
Question 5
1 / -0

Mass of 112ml of oxygen at NTP on liquefaction would be:

A
0.32

B
0.64g

C
0.96g

D
0.16g

Solution
Question 6
1 / -0

The molecular weight of O₂ and SO₂ are 32 and 64, respectively. If one litre of O₂ at 15⁰C and 750mm pressure contain 'N' molecule, the number of molecules in two litres of SO₂ under the same conditions of temperature and pressure will be:

A
N/2

B
N

C
2N

D
4N

Solution
Question 7
1 / -0

A pre-weighed vessel was filled with oxygen at NTP and weighed. It was then evacuated, filled with SO₂at the same temperature and pressure and again weighed. The weight of oxygen is ______________.

A
The same as that of SO₂

B
½ that of SO₂

C
Twice that of SO₂

D
1/4 that of SO₂

Solution

At constant temperature and pressure, an equal volume of gas contains an equal number of moles.

∴ Moles of O₂ = Moles of SO₂

1 mole O₂= 32 g

1 mole SO₂= 64 g

∴ wt of O₂ = 1/2 that of SO₂
Question 8
1 / -0

Ratio of C_pand C_v of a gas 'X' is 1.4. The number of atoms of the gas 'X' present in 11.2L of it at NTP will be

A
6.02 × 10²³

B
1.2 × 10²³

C
3.01×10²³

D
2.01×10²³

Solution
Question 9
1 / -0

In the ideal gas equation, the gas constant R has the dimensions of:

A
mole−atm K

B
litre mole

C
litre−atm K−mole

D
erg K

Solution
Question 10
1 / -0

Volume occupied by an ideal gas at one atmospheric pressure and 0^∘C is V ml. Its volume at 273 K will be

A
V ml

B
V/2 ml

C
2V

D
None of these

Solution

0^∘C is equivalent to 273K i.e., conditions are same so volume will be V ml.

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Re-Attempt Weekly Quiz Competition

Gaseous States Test - 8

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Gaseous States Test - 8

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SHARING IS CARING

Question 1

Gases do not have a definite shape and volume

Volume of the gas is equal to volume of container confining the gas

Confined gas exerts uniform pressure on the walls of its container in all directions

Mass of gas cannot be determined by weighing a container in which it is enclosed

Solution

Question 2

only isothermal process

only adiabatic process

Both(A) and (B)

None of these.

Solution

Question 3

have equal average kinetic energies

have equal molecular speeds

occupy equal volumes

have equal effusion rates

Solution

Question 4

He

HCl

NH3

H2O

Solution

Question 5

0.32

0.64g

0.96g

0.16g

Solution

Question 6

N/2

N

2N

4N

Solution

Question 7

The same as that of SO2

½ that of SO2

Twice that of SO2

1/4 that of SO2​

Solution

Question 8

6.02 × 1023

1.2 × 1023

3.01×1023

2.01×1023

Solution

Question 9

mole−atm K

litre mole

litre−atm K−mole

erg K

Solution

Question 10

V ml

V/2 ml

2V

None of these

Solution

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NH₃

H₂O

The same as that of SO₂

½ that of SO₂

Twice that of SO₂

1/4 that of SO₂

6.02 × 10²³

1.2 × 10²³

3.01×10²³

2.01×10²³