Which is the main reducing agent during production of iron from iron ore in a blast furnace?

Solid and liquid phases of a substance are in equilibrium at the________?

Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called a ________ vapour?

For crushing of solids, the Rittinger’s law states that the work required for crushing is proportional to ________?

The unit of heat transfer co-efficient in SI unit is________?

Separation of materials of the same density based on their sizes by using then-different rates of flow is called________?