Nomality is a measure of the concentration of a solution of a compound dissolved in water that is defined as N = (gram equivalents) / (volume of solution)
When calcium chloride is dissolved in water it dissociates into one ion of Ca2+ and two ions of Cl-.
Molarity is the concentration in terms of moles per liter.
3 liters of 1 molar solution of calcium chloride has 3*2 = 6 gram equivalents of Cl- ions and 3 gram equivalents of Ca2+. When 2 liters of water is added to this, the resulting normal concentration of the solution in terms of Ca2+ ions is 3/5 N and the normal concentration as far as Cl- ions are concerned is 6/5 N.
In fact I have to choose the right one among these 4 alternatives:
a) 1.2 N b) 0.6N c) 2N d) 0.5N
I want the CN=nE/V (normal concetration of the whole)
hope you understand sir!