Physics: Topic-wise Test- 10 - NEET MCQ
30 Questions MCQ Test - Physics: Topic-wise Test- 10
A bulb contains 1 mole of hydrogen and 1 mole of oxygen at temperature T. The ratio of rms values of velocity of hydrogen molecules to that of oxygen molecule is
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An ideal gas is heated from 270 to 6270C at constant pressure. If initial volume was 4m3then the final volume of gas will be
When we heat a gas sample from 
to 3270C then the initial average kinetic energy of the molecules was E. What will be the average kinetic energy after heating?
and 
respectively,then the ratio of velocities of sound in these gases is
A molecule of mass m of an ideal gas collides with the wall of the vessel with the same velocity. The change in the linear momentum of the molecule will be
A Centigrade and Fahrenheit thermometers are dipped in boling water. The Fehrenheit thermometer registers a temperature of 1400.The temperature as registered by the centigrade thermometer is
Which one of the following is not a thermodynamical co-ordinate ?
The mean kinetic energy of a molecule of a gas at 300 K is 6.21 x 10-21J The root mean square velocity of a molecule of H2 gas at this temperature will be (R = 8.3 J/mole K, N = 6.02 x 1023 / mole mass of the hydrogen moleucle = 2 x 1.67 x 10-27 kg
At what temperautre will the rms velocity of oxygen moleucle be sufficient, so as to escape from the earth? Escape velocity from the earth is 11.0 km/s and the mass of 1 moleucle of oxygen 5.34 x 10-26 (Boltzman constant k = 1.38 x 10-23 J/K)
A steel rod 25 cm lo (Y = 20 x 1011 dyne/cm2)ng has a cross-sectional area of 0.8 cm2. What would be the force required to strech this rod by the same amount as the expansion produced by heating it through 100C ? (α = 10-5/0C
A steel scale measures the lenght of a copper wire as 80.0 cm, when both are at 200C the calibration temperature for the scale. What would the scale read for the lenght of the rod when both are at 400 (Given: α for steel = 11 x 10-6/0C and α for Cu = 17 x 10-6/0C)
A sample of gas expands from volume V1 to V2. The amount of work done by the gas is greatest, when the expansion is
In an adiabatic change, the pressure and temperature of a monoatomic gas are related with relation as P α TC where C is equal to
Two samples of air X and Y having same composition and initially at the same temperature and pressure are compressed from volume V to V/2. X is compressed isothermally and Y adiabatically. Then, the final pressure will be
Air is filled in a bottle at atmoshperic pressure and it is cordked at 350C . If the cork can come out at 3 atmospheric pressure then up to what temperature should the bottle be heated in order to remove the cork?
A perfect gas goes from state A to another state B by absorbing 8 x 105J of heat and doing 6.5 x 105J external work. It is now transferred between the same two states in another process in which it absorbs 105J of heat. Then, in the second process
An ideal refrigerator has a freezer at a temperature of -130CThe coefficient of performance of the engine is 5. The temperature of the air (to which heat is rejected) will be
Compressional wave pules are sent to the bottom of sea from a ship and echo is heard after 2s. If bulk modulus of elasticity of water is 2 x 109N/m2 and density of water at 40C is 1 x 103kg/m3 The depth of the sea will be
A quantity of heat required to change the unit mass of a solid substance to its liquid state, while the temperature remains constant, is known as
If the temperature of a black body increases from 70C to 2870C then, the rate of energy of radiation is
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