please answer a and b and c

10. a) The concentration of the given solution is 5M. The absorbance of is found to be 0.209 when this solution is placed in a lcm cuvtte and 258nm radiations are passed through it. Calculate specific absorptivity and what will be the absorbance if the path length of the original solution is increased to 2.5cm (6 Marks) b) Discuss Ion exchange process (or) deionization with a neat sketch (8 Marks) c) Differentiate between Crevice corrosion and Galvanic corrosion (6 Marks)