CBSE
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
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
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
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
A monoatomic gas supplied the heat Q very slowly keeping the pressure constant. The work done by the gas will be
Universal gas constant is :
Cp - Cv
CP + CV
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
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
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