Penetration model (theory) for mass transfer was enunciated by ________?

Washing of coal decreases its________?

Which of the following is used as a coagulant in water treatment?

Permanent hardness of water can be removed by________?

Babbitt metal used for making bearings should have________?

Boiling point of a non-homogeneous mixture of immiscible liquids is ________ that of any one of its separate components?