States of Matter: Gases and liquids Test

Result

States of Matter: Gases and liquids Test - 2

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

The kinetic theory of gases predicts that the total kinetic energy of gaseous assembly depends on

A
pressure of the gas

B
temperature of the gas

C
volume of the gas

D
pressure, temperature and volume of the gas

Solution

K.E. ∝ T
The kinetic theory of gases predicts that the total kinetic energy of gaseous assembly depends on temperature of the gas.
K.E. = 3/2 RT
Question 2
1 / -0

Gases deviate from ideal behaviour because their molecules

A
possess negligible volume

B
are not attracted to each other

C
are polyatomic

D
have forces of attraction between them

Solution

Gases deviate from ideal behaviour because their molecules have forces of attraction between them and because of this the actual pressure of the gas is less than the ideal pressure.
Moreover the volume of the individual gas molecules is also not negligible w.r.t the total volume of the gas.
These are two reasons for the deviation from the ideal behaviour.
Question 3
1 / -0

The following question consists of an Assertion (A) and a Reason (R). Use the following options to mark the appropriate answer.

(A): The pressure of a fixed amount of an ideal gas is proportional to its temperature at constant volume.
(R): Ideal gas molecules neither attract nor repel each other.

A
Both (A) and (R) are correct and (R) is the correct explanation of (A).

B
Both (A) and (R) are correct, but (R) is not the correct explanation of (A).

C
(A) is correct, but (R) is incorrect.

D
(A) is incorrect, but (R) is correct.

Solution

Both the statements are correct as the pressure of a fixed amount of an ideal gas is proportional to its temperature at constant volume and ideal gas molecules neither attract nor repel each other.
Question 4
1 / -0

The following question consists of an Assertion (A) and a Reason (R). Use the following options to mark the appropriate answer.

(A): SO₂gas is easily liquefied while H₂ is not.
(R): SO₂has a high critical temperature, while H₂ has a low critical temperature.

A
Both (A) and (R) are correct and (R) is the correct explanation of (A).

B
Both (A) and (R) are correct, but (R) is not the correct explanation of (A).

C
(A) is correct, but (R) is incorrect.

D
(A) is incorrect, but (R) is correct.

Solution

A gas with a higher critical temperature is easier to liquefy.
SO₂ has high critical temperature (157.5°C) and liquefies readily, while H₂ has a very low (-239.95°C) critical temperature, does not easily liquefy.
Hence, both (A) and (R) are correct and (R) is the correct explanation of (A).
Question 5
1 / -0

When a compressed real gas is allowed to expand through a porous plug at a temperature above its inversion temperature, there is

A
a fall in temperature of the gas

B
a rise in temperature of the gas

C
neither rise nor fall in temperature of the gas

D
a fall in temperature of the gas followed by rise in temperature of the gas

Solution

Since the temperature is greater than the inversion temperature of the gas, there will be heating effect, i.e. rise in temperature of the gas.
Question 6
1 / -0

The following question consists of an Assertion (A) and a Reason (R). Use the following options to mark the appropriate answer.

(A): van der Waals equation is applicable only to non-ideal gases.
(R): Ideal gases obey the equation PV = nRT.

A
Both (A) and (R) are correct and (R) is the correct explanation of (A).

B
Both (A) and (R) are correct, but (R) is not the correct explanation of (A).

C
(A) is correct, but (R) is incorrect.

D
(A) is incorrect, but (R) is correct.

Solution

van der Waals equation is applicable to all gases. Also, ideal gases obey the equation PV = nRT.
Question 7
1 / -0

The following question consists of an Assertion (A) and a Reason (R). Use the following options to mark the appropriate answer.

(A): Helium shows only positive deviation from ideal behaviour.
(R): Helium is an inert gas.

A
Both (A) and (R) are correct and (R) is the correct explanation of (A).

B
Both (A) and (R) are correct, but (R) is not the correct explanation of (A).

C
(A) is correct, but (R) is incorrect.

D
(A) is incorrect, but (R) is correct.

Solution

Helium shows only positive deviations from ideal behaviour, because helium is more compressible than ideal gases.
However, the inert nature of helium is on account of its stable configuration of fully filled K-shell. It does not explain the positive deviation from ideal behaviour.
Hydrogen and helium, on account of their lower mass, expand more and have a compressibility factor greater than 1.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

States of Matter: Gases and liquids Test - 2

Result

States of Matter: Gases and liquids Test - 2

Score

-

Rank

-

SHARING IS CARING

Question 1

pressure of the gas

temperature of the gas

volume of the gas

pressure, temperature and volume of the gas

Solution

Question 2

possess negligible volume

are not attracted to each other

are polyatomic

have forces of attraction between them

Solution

Question 3

Both (A) and (R) are correct and (R) is the correct explanation of (A).

Both (A) and (R) are correct, but (R) is not the correct explanation of (A).

(A) is correct, but (R) is incorrect.

(A) is incorrect, but (R) is correct.

Solution

Question 4

Both (A) and (R) are correct and (R) is the correct explanation of (A).

Both (A) and (R) are correct, but (R) is not the correct explanation of (A).

(A) is correct, but (R) is incorrect.

(A) is incorrect, but (R) is correct.

Solution

Question 5

a fall in temperature of the gas

a rise in temperature of the gas

neither rise nor fall in temperature of the gas

a fall in temperature of the gas followed by rise in temperature of the gas

Solution

Question 6

Both (A) and (R) are correct and (R) is the correct explanation of (A).

Both (A) and (R) are correct, but (R) is not the correct explanation of (A).

(A) is correct, but (R) is incorrect.

(A) is incorrect, but (R) is correct.

Solution

Question 7

Both (A) and (R) are correct and (R) is the correct explanation of (A).

Both (A) and (R) are correct, but (R) is not the correct explanation of (A).

(A) is correct, but (R) is incorrect.

(A) is incorrect, but (R) is correct.

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.