Question

When sugar is dissolved in water there is no increase in volume why?

Answer 1

It is because there are large air spaces in the solution. When the sugar is dissolved the sugar falls into the air spaces, hence there is no change in volume as the air spaces are already present in the volume of solution

Answer 2

Yes, there is no increase in volume because the space present between the atom of water is occupied by the sugar. Therefore, if sugar is dissolved in water there is no increase in volume.