CBSE
The temperature at which root mean square velocity of molecules of helium is equal to root mean square velocity of hydrogen at NTP is
273°C
273 K
546°C
844 K
Universal gas constant is :
Cp - Cv
CP + CV
The temperature at which the mean KE of the molecules of gas is one-third of the mean KE of its molecules at 180C is
-122C
-90C
60C
151°C
A monoatomic gas supplied the heat Q very slowly keeping the pressure constant. The work done by the gas will be
The speed of sound in a gas (=1.5) at 300 K is 340 m/s. The rms velocity of gas molecules will be
340 m/s
m/s
340 m/s
340 m/s
The gas in a vessel is subjected to a pressure of 20 atm at a temperature 27C. The pressure of the gas in a vessel after one-half of the gas is released from the vessel and the temperature of the remainder is raised by 50C is
8.5 atm
10.8 atm
11.7 atm
17 atm
A mixture of oxygen and hydrogen are filled in a vessel at a fixed temperature. The ratio of average kinetic energies of atoms of H2 and O2 is
1 : 16
1 : 8
1 : 12
1 : 1
If 2 g mole of diatomic gas and 1 g mole of monoatomic gas are mixed together, then the ratio of specific heats of mixture is
1 : 24
1 : 58
1 : 46
1 : 60
Who gave the kinetic molecular theory of gas?
Device
Einstein
Newton
Bernoulli
Relation between specific heats of an ideal gas
Cp + CV = R
Cp − CV = R