What is the ratio among most probable velocity, mean velocity and root mean square velocity ?
1:2:3
1: √2:√3
√2:√3: √8/π
√2: √8/π: √3
What is the correct value of the gas constant 'R' from the following ?
0.082 L- atm K
0.082 L- atm K -1 mol-1
0.082 L atm Kmol-1
0.082 L-1 atm-1 K mol
A balloon blown up with 1 mole of gas has a volume of 480 mL at 5ºC. The balloon is filled to 7/8th of its maximum capacity. Will the balloon burst at 30ºC?
Balloon will burst
Balloon will not burst
Bursting of balloon is independent of temperature
Cannot be predicted
What is the coordination number of carbon in diamond ?
four and its unit cell has eight carbon atoms
four and its unit cell has six carbon atoms
six and its unit cell has four carbon atoms
four and its unit cell has four carbon atoms
The first order diffraction of X-rays from a certain set of crystal planes occur at an angle of 11.8º from the planes. If the planes are 0.281 nm apart, what is the wavelength of X-rays?
0.281 nm
0.2044 nm
0.1149 nm
0.1180 nm
As the temperature is raised from 20ºC to 40ºC, the average kinetic energy of neon atoms changes by a factor of which of the following?
2
In a spinel structure, oxide ions are cubical closed packed whereas 1/8th of tetrahedral voids are occupied by A ions and 1/2 of octahedral voids are occupied by B ions. The charge present on A and B ions will be
A2+, B3+
A3+, B2+
A4+, B2-
A-1, B2-
Which is not true in case of ideal gas?
It can not be converted into a liquid
There is no interaction between the molecules
All molecules of the gas move with same speed
At a given temperature, PV is proportional to the amount of gas.
Which among the following statement is correct regarding the gas equation PV= nRT ?
n is the number of molecules of a gas
V denotes volume of one mole of the gas
n moles of the gas have a volume V.
P is the pressure of the gas when only one mole of the gas is present.
Which of the following expressions is correct for a CsCl unit cell with lattice parameter, a?