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:

A strip of Magnesium metal is burnt in the flame. It is observed that

When iron nails are placed in copper-sulphate solution, after 10 minutes, its blue colour disappears and the solution appears