The edge length of face centred unit cubic cell is 508pm. If the radius of the cation is 110pm, the radius of the anion is ,
288pm
398pm
144pm
618pm
If a gas expands at constant temperature, it indicates that
kinetic energy of molecules decreases
pressure of the gas increases
kinetic energy of molecules remains the same
number of the molecules of the gas increases.
A closed flask contains water in all its three states solid, liquid and vapour at 0oC. In this situation, the avearage kinetic energy of water molecules will be
the greatest in all the three states
the greatest in vapour state
the greatest in the liquid state
the greatest in the solid state
A compound formed by elements A and B crystallises in the cubic structure, where A atoms are present at the corner of a cube and B atoms are present at the face centres. The formula of the compound is
A2B2
AB3
AB
A3B
Which one of the following is wrong statement for gases?
Gases do not have a definite shape and volume
Volume of the gas is equal to volume of container confining the gas
Confined gas exerts uniform pressure on the walls of its container in all directions.
Mass of gas can not be determined by weighing a container in which it is enclosed.
Lithium metal crystallises in a body centred cubic crystal. If the length of the side of the unit cell of lithium is 351pm, the atomic radius of the lithium will be,
240.8pm
151.8pm
75.5pm
300.5pm
A solid with high electrical and thermal conductivity from the following is
Si
Li
NaCl
Ice
600cc of a gas at a pressure of 750 mm is compressed tp 500cc. Taking the temperature to remain constant, the increase in pressure is ,
150mm
250mm
350mm
450mm
Under what conditions will a pure sample of an ideal gas not only exhibit a pressure of 1 atm but also a concentration of 1mol L-1? (R= 0.082 L atm mol-1 deg-1).
At STP
When V= 22.4L
When T= 12K
Impossible under any conditions
The number of atoms contained in a fcc unit cell of a monoatomic substance is
1
2
4
6
