Pick out the wrong statement

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Pick out the wrong statement.

A. The value of hydrostatic head increases with increase in vacuum in the effect in a multiple effect evaporator system

B. Entering velocity of the liquid in the tubes of natural circulation evaporators is in the range of 0.3 to 0.9 metre/second

C. Duhring's plot is used for calculating the concentration of solution

D. In a multiple effect evaporation system, the number of effects is limited by the total boiling point rise

Answer: Option C

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