Related Questions

Schimdt number and Lewis number for pure air at atmospheric conditions are respectively
A [

A.

B. 1 and 0

B >1 and ≈ 1
C 0 and ≈ 1
Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of
A Mass diffusivity to momentum diffusivity
B Thermal diffusivity to mass diffusivity
C Momentum diffusivity to thermal diffusivity
D None of these
Lewis number (Le) is
A Sc × Pr
B Pr × St
C Sh × Pr
D St × Sh
If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is
A 0
B 1
C > 1
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around
A 1
B 0.24
C 3.97
D 600
Which of the following is not a Lewis acid?
A aluminium chloride
B sodium ion
C sulphur tetrafluoride
D hydroxide ion
Which is not a Lewis acid?
A AlCl3
B BF3
C NH3
D FeCl3
কোনটি লুইস এসিড? (Which is a Lewis acid?)
A HCI
B Ag+
C NH4+
D CO
নিচের কোনটি লুইস ( Lewis ) এসিড?
A         SO3 
B BF3
C  H+
D সবগুলো
Lewis equation in gears is used to find the
A Tensile stress in bending
B Shear stress
C Compressive stress in bending
D Fatigue stress

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