The surface renewal frequency in Danckwerts model of mass transfer is – McqOptions

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1.	The surface renewal frequency in Danckwerts model of mass transfer is given by (KL: mass transfer co-efficient)
A.	‚Äö√ √∂(KL¬¨‚â§.DA)
B.	KL¬¨‚â§.DA
C.	KL¬¨‚â§/DA
D.	KL/DA¬¨‚â§
Answer» B. KL¬¨‚â§.DA

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