When we add water to a glass of pure fruit the volume of the solution increases while the solute remains constant so the molarity of the juice decreases.
Molarity is defined as the amount of solute (in moles)in per litre of solution.
It is also known as molar concentration of a solution , It is expressed in mol/l .
When water is added the volume of the solution is increasing for fixed moles of juices therefore ,
The molarity of the juice will decrease and option d is correct.
To know more about molarity
https://brainly.com/question/2817451
#SPJ2