Related Questions

The density of a gas 'X' is twice that of another gas 'Y'. If the molecular weight of gas 'Y' is 'M'; then the molecular weight of the gas 'X' will be
A 2M
B $$\frac{{\text{M}}}{2}$$
C M
D $$\frac{{\text{M}}}{4}$$
For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume and T = Absolute temperature)
A $$\frac{{\text{v}}}{{\text{T}}}$$ = constant, if p is kept constant
B pv = constant, if T is kept constant
C $$\frac{{\text{T}}}{{\text{p}}}$$ = constant, if v is kept constant
D $$\frac{{\text{p}}}{{\text{T}}}$$ = constant, if v is kept constant
If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity
A Vi = Vo
B Vt > Vo
C U
D V = Uo
In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where, T = absolute temperature )
A $$\frac{1}{{\sqrt {\text{T}} }}$$
B $$\frac{1}{{\text{T}}}$$
C $$\sqrt {\text{T}} $$
D T
In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where M = molecular weight of the gas)
A $$\frac{1}{{\sqrt {\text{M}} }}$$
B $$\sqrt {\text{M}} $$
C $$\frac{1}{{\text{M}}}$$
D M
The absolute entropy for all crystalline substances at absolute zero temperature is
A Zero
B Negative
C More than zero
D Indeterminate
Wien’s law states that the wave length corresponding to ________ is proportional to the absolute temperature.
A Minimum energy
B Maximum energy
C Both (A) and (B)
D None of these
Kinetic energy of the molecules in terms of absolute temperature (T) is proportional to
A T
B J
C J2
D Vr
Wavelength corresponding to the maximum energy is inversely proportional to the absolute temperature. This is __________ law.
A Stefan's
B Dalton's
C Wien's
D Kirchoffs
The Kundsen diffusivity is proportional to (where, T = absolute temperature)
A $$\sqrt {\text{T}} $$
B T2
C T
D T4

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