Pressure drop due to pipe fittings can be estimated by the equation, ΔP/ρ = 4f, (Le/D) (V2/2gc) where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of (Le/D) (dimensionless) for 45° elbow and 180° close return bends would be respectively around________?

Pick out the wrong statement?

Reflux ratio variation in a distillation column is between________?

In stripping section of continuous distillation column, the________?

________ is a cohesive solid?

Platinum and silver are corroded by________?