Multistage compression of air as compared to single stage compression offers the advantage of________?

Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its ________?

Specific ________ does not change during a phase change (e.g. sublimation, melting, vaporisation etc.)?

Packed column distillation is limited to the column ________ metres?

Steam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is________?

When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is ________ distillation?