This chapter is currently out of syllabus
1
JEE Main 2019 (Online) 10th April Morning Slot
+4
-1
Out of Syllabus
Consider the following table :

Gas a/(k Pa dm6 mol-1) b/(dm3 mol-1)
A 642.32 0.05196
B 155.21 0.04136
C 431.91 0.05196
D 155.21 0.4382

a and b are vander Waals constants. The correct statement about the gases is :
A
Gas C will occupy more volume than gas A; gas B will be more compressible than gas D
B
Gas C will occupy lesser volume than gas A; gas B will be more compressible than gas D
C
Gas C will occupy lesser volume than gas A; gas B will be lesser compressible than gas D
D
Gas C will occupy more volume than gas A; gas B will be lesser compressible than gas D
2
JEE Main 2019 (Online) 9th April Evening Slot
+4
-1
Out of Syllabus
At a given temperature T, gases Ne, Ar, Xe and Kr are found to deviate from ideal gas behaviour. Their equation of state is given as

$$p = {{RT} \over {V - b}}$$ at T.

Here, b is the van der Waals constant. Which gas will exhibit steepest increase in the plot of Z (compression factor) vs p?
A
Xe
B
Ne
C
Ar
D
Kr
3
JEE Main 2019 (Online) 9th April Morning Slot
+4
-1
Out of Syllabus
Consider the van der Waals constants, a and b, for the following gases.

Gas Ar Ne Kr Xe
a/ (atm dm6 mol–2) 1.3 0.2 5.1 4.1
b/ (10–2 dm3 mol–1) 3.2 1.7 1.0 5.0

Which gas is expected to have the highest critical temperature?
A
Ne
B
Kr
C
Xe
D
Ar
4
JEE Main 2019 (Online) 12th January Evening Slot
+4
-1
Out of Syllabus
An open vessel at 27oC is heated until two fifth of the air (assumed as an ideal gas) it has escaped from the vessel assuming that the volume of the vessel remains constant, the temperature at which the vessel has been heated is -
A
750 K
B
500oC
C
750oC
D
500 K
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