MolSynapse
question bank
All chapters
NEET
JEE
Practice
MolSynapse
/
Question bank
/
Real Gases
/
van der Waals equation and its constants
NEET level
Single correct option
Difficulty 1 of 3
rg013
The SI unit of the van der Waals constant
b
is
A
Pa
m
6
mo
l
−
2
B
m
3
mo
l
−
1
C
J
mo
l
−
1
D
mol
m
−
3
Answer: B
nb
is subtracted from the volume
V
, so
b
has units of volume per mole, i.e.
m
3
mo
l
−
1
(or
L
mo
l
−
1
). The constant
a
has units
Pa
m
6
mo
l
−
2
.
Practice Real Gases
More on van der Waals equation and its constants
Previous question
Next question
More questions on van der Waals equation and its constants
In the van der Waals equation (P + (an^2)/(V^2))(V - nb) = nRT, the term (an^2)/(V^2) corrects for
NEET level
The van der Waals constants of four gases are: W (a = 0.034, b = 0.0237), X (a = 1.39, b = 0.0391), Y (a = 3.59, b = 0.0427), Z (a = 4.17, b...
JEE Advanced level
Two moles of CO2 (a = 3.59 L^2 atm mol^-2, b = 0.0427 L mol^-1) are kept in a 5.0 L vessel at 300 K. Using the van der Waals equation and R ...
JEE Main level
The van der Waals constant b is related to the radius r of a spherical molecule by
JEE Main level
The van der Waals constant b of a gas is 0.0400 L mol^-1. Treating molecules as hard spheres with b = 4N_A((4)/(3)pi r^3) and N_A = 6.022 x ...
JEE Main level
The van der Waals constant a for a gas is 1.39 L^2 atm mol^-2. Its value in SI units (Pa m^6 mol^-2) is approximately (1 atm = 1.013 x 10^5 ...
JEE Main level