CBSE
Multiple Choice QuestionsAs the temperature is raised from 20°C to 40C, the average kinetic energy of neon atoms changes by a factor:
2
When the temperature of an ideal gas is increased from 27°C to 927°C, the kinetic energy will be
same
eight times
four times
twice
At relatively high pressure, vander Waal's equation reduces to:
pV=RT
pV=RT
pV=RT
pV=RT+pb
a/ V2 given in van der Waal's equation is for
internal pressure
inter molecular attraction
both (1) and (2)
temperature correction
A certain sample of gas has a volume of 0.2 L measured at 1 a:tm pressure and 0°C. At the same pressure but 273°C, its volume will be :
0.4 L
0.8 L
27.8 L
55.6 L
Which of the following is not a property of liquid state ?
Intermolecular force of attraction in a liquid is quite large
All liquids accompanied by cooling on evaporation
Lower the boiling point of a liquid, greater is its vapour pressure at room temperature
A liquid boils at high temperature at the top of a mountain than at the sea level
4.5 g of aluminium (Atomic mass 27 amu) is deposited at cathode from Al3+ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H+ ions in solution by the same quantity of electric charge will be
22.4 L
44.8 L
5.6 L
11.2 L
When a bottle of dry ammonia and a dry hydrogen chloride are connected through a long tube and stoppers at both ends of the tube are opened simultaneously. The white ammonium chloride ring first formed will be:
at the centre of the tube
near the hydrogen chloride bottle
near the ammonia bottle
throughout the length of the tube
Ratio of molecular weights of A and B is then ratio of rates of diffusion will be
5 : 1
5 : 2
25 : 3
25 : 4
Volume of CO2 obtained from complete decomposition of 20 g CaCO3 at STP is
2.24 litre
4.48 litre
20 litre
22.4 litre
