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
Which of the following is the anhydride of nitric acid?
NO
NO2
N2O3
N2O5
D.
N2O5
Anhydrides are formed by the elimination of water from oxyacid. If oxyacid has odd number of hydrogen then elimination of water is done by multiplying by 2.
2 × HNO3 = H2N2O6 N2O5