Account for the following facts: (a)The reduction of a metal oxide is easier if the metal formed is in liquid state at the temprature of reduction. (b)The reduction of Cr_(2)O_(3) with Al is thermodynamically feasible ,yet it does not occur at room temprature. (c )Pine oil is used in forth floatation method.

Account for the following facts: (a)The reduction of a metal oxide is

1.	Account for the following facts: (a)The reduction of a metal oxide is easier if the metal formed is in liquid state at the temprature of reduction. (b)The reduction of Cr_(2)O_(3) with Al is thermodynamically feasible ,yet it does not occur at room temprature. (c )Pine oil is used in forth floatation method.
Answer» Solution :(a)In liquid state entropy is HIGHER than the solid form ,this makes`Delta_(R)G` more negative. (b)By increasing the TEMPRATURE ,FRACTION of activated molecules icreases ,which helps in crossing over the energy barrier. (C ) PINE oil enhances the non-wetting property of the ore particles and also acts as the froth collector: