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Test: Gaseous State - 6 - Chemistry MCQ


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30 Questions MCQ Test Physical Chemistry - Test: Gaseous State - 6

Test: Gaseous State - 6 for Chemistry 2024 is part of Physical Chemistry preparation. The Test: Gaseous State - 6 questions and answers have been prepared according to the Chemistry exam syllabus.The Test: Gaseous State - 6 MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Gaseous State - 6 below.
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Test: Gaseous State - 6 - Question 1

A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at: 

Test: Gaseous State - 6 - Question 2

One mole of an ideal monoatomic gas is mixed with 1 mole of an ideal diatomic gas. The molar specific heat of the mixture at constant volume is:

Detailed Solution for Test: Gaseous State - 6 - Question 2

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Test: Gaseous State - 6 - Question 3

According to kinetic theory of gases, for a diatomic molecule:

Detailed Solution for Test: Gaseous State - 6 - Question 3

According to the kinetic molecular theory, the average kinetic energy of gas particles is proportional to the absolute temperature of the gas. This can be expressed with the following equation where k represents the Boltzmann constant.

Test: Gaseous State - 6 - Question 4

The ratio between the rms velocity of H2 at 50 K and that of O2 at 800 K is:

Detailed Solution for Test: Gaseous State - 6 - Question 4

The formula used for root mean square speed is:

vrms = (3RT/M)1/2

where, vrms = root mean square speed

R = gas constant

T = temperature = 50 K

M = atomic mass of hydrogen = 2 g/mole

Now put all the given values in the above root mean square speed formula, we get:

vrms = [(3*R*50)/2]1/2

2) For rms of Oat 800 K.

vrms = (3RT/M)1/2

where,

vrms = root mean square speed

R = gas constant

T = temperature =800 K

M = atomic mass of oxygen = 32 g/mole

Now put all the given values in the above root mean square speed formula, we get:

vrms = [(3*R*800)/2]1/2

The ratio between the rms speed of H2 at 50K and that of O2 at 800K is 

[(3*R*50)/2]1/2/[(3*R*800)/2]1/2

= 1

Test: Gaseous State - 6 - Question 5

The compressibility factor for an ideal gas is:

Detailed Solution for Test: Gaseous State - 6 - Question 5

It may be thought of as the ratio of the actual volume of a real gas to the volume predicted by the ideal gas at the same temperature and pressure as the actual volume. For an ideal gas, Z always has a value of 1.

Test: Gaseous State - 6 - Question 6

X mL of H2 gas effuses through a hole in a container in 5 seconds. The time taken for the effusion of the same volume of the gas specified below under identical conditions is:

Test: Gaseous State - 6 - Question 7

One mole of N2O4(g) at 300 K is kept in a closed container under one atmosphere. It is heated to 600 K when 20% by mass of N2O4(g) decomposes to NO2(g). The resultant pressure is:

Detailed Solution for Test: Gaseous State - 6 - Question 7

Test: Gaseous State - 6 - Question 8

When a gas is passed through a small hole at a temperature greater then its critical temperature, Joule-Thomson effect will show:

*Multiple options can be correct
Test: Gaseous State - 6 - Question 9

Which of the following choice(s) is (are) correct for a gas:

Detailed Solution for Test: Gaseous State - 6 - Question 9

Test: Gaseous State - 6 - Question 10

The average velocity of anideal gas molecule at 27°C is 0.3 m/s. The average velocity at 927°C will be:

Detailed Solution for Test: Gaseous State - 6 - Question 10

We know,  
V1/V2 = [T1/T2]1/2
T1 = 27o
= 300K
T2 = 927o
= 1200K
V1 = 0.3ms-1
V2 = [T2/T1]1/2 × V1 

= [1200/300] × 0.3
= 0.6ms-1
 

Test: Gaseous State - 6 - Question 11

Which of the fo llowing is/are correct?

(I) If liquid “kryptonite” (from Superman’s home planet), with a density twice that of mercury, is used in a barometer on earth, one standard atmosphere of pressure would support a column of mercury 380 mm in height.
(II) At constant volume and number of moles of gas, the pressure exhibited by an ideal gas is directly proportional to its absolute temperature.
(III) At standard temperature and pressure (STP), the volume of a mixture of gases containing 0.400 mol H2, 0.600 mo l N2, and 1.00 mol of O2 is 44.8 L and the mole fraction of N2 is 0.300.

Detailed Solution for Test: Gaseous State - 6 - Question 11


Test: Gaseous State - 6 - Question 12

Which of the following is(are) true for the real gases. (‘C’ represents so me constant value, ‘R’ represents molar gas constant).

Test: Gaseous State - 6 - Question 13

Which of the following statements are correct?

Test: Gaseous State - 6 - Question 14

What conclusion would you draw from the following graphs for an ideal gas:

Test: Gaseous State - 6 - Question 15

At Boyle temperature:

Test: Gaseous State - 6 - Question 16

Indicate the correct statement for equal volume of N2(g) and CO2(g) at 25°C and 1 atm:

Detailed Solution for Test: Gaseous State - 6 - Question 16

Test: Gaseous State - 6 - Question 17

Which of the following is correct for critical temperature:

Test: Gaseous State - 6 - Question 18

Consider the following statement regarding Maxwell’s distribution of velocities. The correct statement(s) is/are:

Test: Gaseous State - 6 - Question 19

If a gas expands at a constant pressure by providing heat:

Test: Gaseous State - 6 - Question 20

Select incorrect statement(s):

Test: Gaseous State - 6 - Question 21

Following represents the Maxwell distribution curve for an ideal gas at two temperature T1 and T2. Which of the following option(s) are true?

Test: Gaseous State - 6 - Question 22

Select the correct statement(s):

Test: Gaseous State - 6 - Question 23

Select the correct statement:

Test: Gaseous State - 6 - Question 24

Select incorrect statements for real gas:

Test: Gaseous State - 6 - Question 25

Select correct statements:

Test: Gaseous State - 6 - Question 26

Which graphs represent the deviation fro mideal gas for H2:

Test: Gaseous State - 6 - Question 27

Select incorrect statement(s):

Detailed Solution for Test: Gaseous State - 6 - Question 27

Incorrect statement is D. The compressibility factor for an ideal gas is zero. This statement is incorrect. The compressibility factor (Z) is defined as Z = PV/nRT. For an ideal gas, by definition, Z is equal to 1 because PV = nRT according to the ideal gas law.

Test: Gaseous State - 6 - Question 28

If an ideal gas is heated at constant pressure:

Test: Gaseous State - 6 - Question 29

Select correct statement:

Test: Gaseous State - 6 - Question 30

Consider the following statements. If the van der Waal’s parameters of two gases are given as 

Then:

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