The size of colloidal particles is in between
10-7 - 10-9 cm
10-9 - 10-11 cm
10-5 - 10-7 cm
10-2 - 10-3 cm
The stability of lyophilic colloids is due to which of the following?
Charge on their particles
Large size of their particles
Smaller size of their particles
A layer of medium of dispersion on their particles
Milk is
fat dispersed in water
water dispersed in fat
water dispersed in oil
fat dispersed in fat
After partial roasting the sulphide of copper is reduced by
reduction by carbon
electrolysis
self-reduction
cyanide process
C.
self-reduction
In the extraction of Cu matte is obtained from blast furnace. Mattle contams 40% copper. Besemerisation of matte is based on self reduction, because C2O and Cu2S on reaction with each other in Bessemer converter forms copper metal.
2Cu2O + Cu2S → 6Cu + SO2