A vessel contains 1 mole of O2 gas (molar mass 32) at temperature T. The pressure of the gas is P. An identical vessel containing one mole of He (molar mass 4) at a temperature 2T has a pressure of
P/8
P
8P
2P
What is the absolute mass of an atom of oxygen? Atomic mass of oxygen is 16 and Avogadro's number =
A cylinder contains 10 kg of gas at a pressure of 107 N/m2 . The quantity taken out of the cylinder if the final pressure is . (temperature of gas is constant) is
7.5 kg
zero
9.5 kg
14.2 kg
A sphere of diameter 7 cm and mass 266.5 gm floats in a both of a liquid. As the temperature is raised, the sphere just begins to sink at a temperature of 35o C. If the density of liquid at 0o C is 1.527 gm/cc and neglecting the expansion of sphere, the coefficient of cubical expansion of liquid will be :
0.00083 /oC
0.0083 /o C
0.083 /o C
0.83 /o C
If the degree of freedom of a gas is f, then the ratio of two specific heats is equal to :
A pendulum clock consists of an iron rod connected to a small, heavy bob. If it is designed to keep correct time at 20o C, how fast or slow will it go in 24 h at 40o C.
10.4 s
10.72 s
10.68 s
10.9 s
The kinetic energy of one gm - molecule of a gas at normal temperature and pressure is (R = 8.31 J mol-1 K-1 )
0.56 x 104 J
1.3 x 102 J
2.7 x 103 J
3.4 x 103 J
When temperature of an ideal gas is increased from 27o C to 227o C, its r.m.s speed is changed from 400m/s to vs . The vs is :
516 m/s
650 m/s
810 m/s
546 m/s
Two straight metallic strips each of thickness t and length l are riveted together. Their coefficients of linear expansions are If they are heated through temperature , the bimetallic strip will bend to form an arc of radius :
