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The value of compressibility factor at the critical state for a van der Waals gas is
A
0.325
B
0.350
C
0.375
D
0.400
Correct Answer:
0.375
This value comes from the relation, R=(8/3)(p*v/T) where p,v,T are critical values.
Real gases conform more closely with the van der Waals equation of state than the ideal gas equation of state.
A
true
B
false
For the Van der Waals real gas equation Statement I: The unit of constant a is atm.L2/mole2 Statement II: The unit of constant b is L
A
Both statements are false
B
Only one can be true at a time
C
Both statement are true
D
None of the mentioned
The internal pressure of a van der Waals gas is
A
independent of the molar volume
B
inversely proportional to the molar volume
C
inversely proportional to square of the molar volume
D
directly proportional to the molar volume
Compressibility factor of a real gas is the ratio of the actual volume to that predicted by ideal gas law. As the pressure of the gas approaches zero, the compressibility factor approaches
A
∞
B
0
C
1
D
0.24
What is the power of diminishment of van der Waals force with respect to distance?
A
2
B
4
C
6
D
8
A van der Waals bond is a _________ bond.
A
Primary
B
Secondary
C
Tertiary
D
Quaternary
Which of the following of a protein molecule determines the strength of van der Waals force?
A
The molecular weight of the protein
B
PI of the protein
C
Number of amino acids present
D
The surface area of the molecule
Van der Waals forces are the only attractive forces present in nonpolar compounds.
A
True
B
False
In physical adsorption the enzymes are attached to the matrix through hydrogen bonding, van der Waals forces, or hydrophobic interactions; whereas in ionic bonding, the enzymes are bound through?
A
Hydrophilic linkage
B
Di-sulphide bonding
C
Salt linkages
D
Cross-linking
What are the units of “b” in van der Waals equation?
A
L/mol
B
L mol
C
1/L mol
D
L