On addition of solute in the solvent, the ________ of the solution decreases?

A coal gasifier operating at 20 atm. (e.g. Lurgi gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having ________?

For ideally incompressible fluid, the Mach number will be ________?

Deoiling is the process of removal of oil from wax. It is done by the ________ process?

________ property of steel increases by addition of large amount of silicon in it?

Any substance above its critical temperature exists as ________?