Pumping of a corrosive liquid is generally preferred to be done by a ________ pump, as it can be made of a variety of materials including plastics?

Bomb calorimeter is used for the determination of calorific value of the ________ fuels?

Reboiler is considered as one theoretical plate, because________?

Pick out the correct statement?

Traces of liquid tar fog present in coke oven gas is separated using________?

Aluminium is extracted from________?