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.
Pressure remaining the same the volume of a given mass of an ideal gas increases for every degree centigrade rise in temperature by definite fraction of its volume at
0oC
Absolute zero
Its critical temperature
Its Boyle's temperature
A liquid can exist only
between triple point and critical temperature
at any temperature above the melting point
between melting point and critical temperature
between boiling and melting temperature
A gas is said to behave like an ideal gas when the relation PV / T = constant. When do you expert a real gas to behave like an ideal gas?
When the temperature is low
When both the temperature and pressure are low
When both the temperature and pressure are high
When the temperature is high and pressure is low.
The surface tension of which of the following liquids is maximum?
H2O
C6H6
CH3OH
C2 H5OH
Absolute zero is defined as the temperature
at which all molecular motion ceases
at which liquid helium boils
at which ether boils
All of the above
The ratio among most probable velocity, mean velocity and root mean square velocity is given by,
1:2:3
1: √2:√3
√2:√3: √8/π
√2: √8/π: √3
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.
At 25oC and 730 mm pressure, 380mL of dry oxygen was collected. If the temperature is constant, what volume will the oxygen occupy at 760mm pressure?
365mL
2g
10g
20g