Which of the following aqueous solutions is more concentrated [Assume the density of the solution as 1g/ml]
 

 Because 1 M solution contains 1 mole of solute in 1 litre of solution [where both solute and solvent are present], it is more concentrated than 1 m aqueous solution. The mass of the solvent [water] in this litre is less than 1000g. In contrast, 1 mole of the solute is contained in 1000g of the solvent in a 1m solution.

Number of moles of glucose =180g
Mass of solvent in kg = 1
Mass of solvent = 1000+180g=1180g

volume=1.18L
concentration=1/1.18M

Hence, option(A) 1M is correct.