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
An example of halide ores is
galena
bauxite
cinnabar
cryolite
D.
cryolite
Among the given options, cryolite [Na3AlF6] is halide ore. Bauxite (Al2O3.2H2O) is an oxide ore and Galena (PbS) and Cinnabar (HgS) are sulphide ore.
After partial roasting the sulphide of copper is reduced by
reduction by carbon
electrolysis
self-reduction
cyanide process