571. What is the relative rate of effusion of CO and CO2 ?
A. CO is 1.25 times faster than CO2
B. CO is 3.75 times faster than CO2
C. CO is 1.25 times faster than CO
D. Both diffuse at the same rate

572. Which of the following is not considered as an intermolecular force between molecules ?
A. Coordinate covalent bonds
B. Hydrogen bonds
C. Debye forces
D. London dispersion forces

573. Ideal gasses have all the following characteristics except ?
A. Absence of intermolecular forces
B. Collisions among the molecules of an ideal gas are perfectly elastic
C. The molecules occupy no space
D. All of the above are correct

574. Under what conditions the gases deviate from the ideal behavior ?
A. High temperature
B. Low temperature
C. High pressure
D. B and C

575. Which one has the lowest density at room temperature ?
A. Ne
B. N2
C. NH3
D. CO

576. The introduction of Kelvin scale in thermodynamic is according to_______________?
A. Boyles law
B. Charles law
C. Daltons law
D. Grahams law

577. At constant temperature the pressure of an ideal gas is doubled its density becomes_______________?
A. Half
B. Double
C. Same
D. None

578. The diffusion of gases at absolute zero will be________________?
A. Unchanged
B. Slightly decreased
C. Slightly increased
D. Zero

579. Critical temperature for different gases is different and depends upon______________?
A. Size of molecule
B. Shape of molecule
C. Intermolecular attractions
D. All of the above

580. What is the simplest form of matter ?
A. Gas
B. Liquid
C. Solid
D. Semi solid