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Question
Pick out the wrong statement.
Options:
A .  The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are the same for NSc = NPr = 1
B .  1 Nm³ of dry air is lighter than 1Nm³ of humid air
C .  The Lewis number of a mixture is unity, when the thermal diffusivity is equal to the mass diffusivity
D .  An azeotropic mixture of two liquids has boiling point higher than either of them, when it shows negative deviation from Raoult
Answer: Option B

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