A192002 Pages: 3

a) Describe the process of demineralization of water using ion-exchange resins (6)
with equations.
b) Compare aerobic and anaerobic oxidation of sewage water. (4)
OR
a) Explain the principle and procedures of EDTA method with equations. (6)

ட) 50 ml ofa water sample requires 9 ml of an EDTA solution for the titration. 1 (4)
ml of the same EDTA solution was required for the titration of 50 ml of
standard hard water containing 1 gm of CaCOs per litre. Calculate the hardness
of water sample in ppm.

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