Question

What is meant by concentration of a solution? How will you prepare a 10% solution of glucose in water?

Draw a neat and labelled diagram of the apparatus used to separate components of blue-black ink. Name the process and state the principle involved.

Identify the physical and chemical changes from the following:

Four students prepared mixtures in water by taking sugar, sand, chalk power and starch respectively, in four different test tubes. After stirring, the mixture that appeared clear and transparent was that of