Steel tower used for the storage of oleum________?

The conductivity of crude oil-water mixture depends on the________?

Satellites burn off during re-entry to earth’s atmosphere, because of the ________?

An example of a periodic furnace is the________?

Oils are partially hydrogenated (not fully) to manufacture Vanaspati, because fully saturated solidified oils?

Which is the most suitable for the concentration of foamy & frothy liquors?