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
The brass is an alloy of
gold and copper
silver and zinc
copper and zinc
copper and aluminium
C.
copper and zinc
Brass is an alloy of copper and zinc. It contains 70% copper and 30% zinc.