How much water should be added to $15 \, g$ of salt to obtain a $15 \%$ salt solution (in $, g$)?

Tincture of iodine has antiseptic properties. This solution is made by dissolving

Define a solution. Give an example of $(i)$ gas in liquid solution $(ii)$ gas in gas solution.

While making shikanjwi,Savy was aware of which substances to use,added sugar,salt,and water in different amounts,and mixed them thoroughly. She was amazed as it tasted the same throughout.
$(a)$ According to you,what qualities are possessed by Savy?
$(b)$ Why do you think shikanjwi tastes the same throughout?

What volume of ethyl alcohol and water must be mixed together to prepare $250 \, mL$ of $50 \%$ by volume of alcohol in water?

$(a)$ Give any one point of difference between true solution,colloidal solution,and suspension.
$(b)$ $20 \, g$ of sodium chloride is dissolved in $100 \, mL$ of water. How will you test whether the given solution is saturated or unsaturated at the given temperature?
$(c)$ Suggest any one method by which we can increase the solubility of saturated solutions.