If f = moles of vapour present per mole of feed, then the slope of fee – McqOptions

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1.	If f = moles of vapour present per mole of feed, then the slope of feed line is (McCabeThiele method)
A.	(1 - f)/f
B.	- (f - 1)/f
C.	-1/f
D.	-f/(1 - f)
Answer» D. -f/(1 - f)

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