Based on which factor is a solution said to be dilute,concentrated,or saturated?

State whether the following statement is true or false:
$A$ compound is a substance composed of two or more elements,chemically combined with one another in a fixed proportion.

During an experiment, students were asked to prepare a $10\%$ (mass/mass) solution of sugar in water. Ramesh dissolved $10\,g$ of sugar in $100\,g$ of water, while Sarika prepared it by dissolving $10\,g$ of sugar in water to make $100\,g$ of the solution.
$(a)$ Are the two solutions of the same concentration?
$(b)$ Compare the mass percentage of the two solutions.

Classify each of the following as an element,compound,or mixture:
Gold,Air,Marble,Milk,Sugar.

Define distillation.

Can we separate alcohol dissolved in water by using a separating funnel? If yes,then describe the procedure. If not,explain.