The concentration of a salt solution in terms of mass by mass percentage is $20 \%$ and the mass of the solution is $550 \text{ g}$. Determine the mass of solute present in the solution. (in $\text{ g}$)

State whether the following statement is true or false:
The movement of tiny particles in a gas or liquid is called the Tyndall effect.

$(a)$ Calculate the mass of potassium chloride required to prepare its $40 \%$ solution in $100 \, g$ of water.
$(b)$ Explain the term solubility and the effect of temperature on it.

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?

Calculate the mass of sodium sulphate required to prepare its $20\%$ (mass percent) solution in $100\,g$ of water. (in $,g$)

What is tincture of iodine? Identify the solute and solvent in 'tincture of iodine.' Why is the Tyndall effect not seen in a true solution?