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qUESTIONS

A gaseous mixture consists of 16 g of helium and 16 g of oxygen. The ratio Cp/Cv of the mixture is

From Kirchhoff’s law of thermal radiation, which one of the following is constant

Two solid spheres of radii R1 and R2 made of same material and have similar surfaces. The spheres are raised to the same temperature and then allowed to cool under identical conditions. Assuming spheres to be perfect conductors of heat, then the ratio of initial rates of cooling are

For a perfectly black body, the graph is plotted between the frequency of radiation with maximum intensity (Vm) and the absolute temperature T. Out of the following which is the correct graph

A container A contains an ideal gas at pressure ‘P’, volume ‘V’ and temperature ‘T”. A second container ‘B’ contains the same gas at pressure ‘2P’, volume ‘2V’ and temperature ‘T/2’. The ratio of mass of gas in A to that in B is

If one mole of an ideal gas Ɣ= 5/3 is mixed with one mole of a diatomic gas Ɣ=7/5 The value of ‘ Ɣ ‘ for the mixture is

A jar ‘P’ is filled with a gas by parameters P, V and T, V another jar ‘Q’ filled with a gas with parameters 2P, V/4 and 2T, where the symbols have their usual meanings. The ratio of number of molecules of jar ‘P’ to those of jar ‘Q’ is

A black sphere has radius ‘R’ whose rate of radiation is ‘E’ R at temperature ‘T”. If radius is madeR/3 and temperature ‘3T the rate of radiation will be

The molar specific heat at constant pressure of an ideal gas is 7/2 R. The gas is made up of molecules which are (R = gas constant)

If R is universal gas constant then the amount of heat needed to raise the temperature of 2 moles of an ideal monoatomic gas from 273 K to 373 K when no work done is

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