Which of the following solutions is more concentrated in each pair
List-I : 0.5 M KCl (or) 0.5 wt% in water.
List-II : 1.75 M glucose (or) 1.75 m glucose in water.

When 1mol of solute dissolves in 1 litre of final solution, the result is a molar solution. You won't need more than 1000 ml or 1000 grams of water to create a 1 molar solution because the solute must contribute some volume to the final solution.When 1mol of the solute is dissolved in 1000g (or 1000ml in the case of water), that solution is referred to as a molal solution. The solution will have a volume greater than 1 litre.Molar solutions have higher concentrations than molal solutions because the solute is dissolved in less water in molar solutions.In light of the foregoing discussion, 0.500 M KCl is more appropriate. more than 0.5 wt% KCl.The concentration of 1.75 molar glucose is higher than that of 1.75 molal glucose.

Hence, the correct option is: (A) List-I : 0.5 M KCl , List-II : 1.75 M glucose