What is a litmus solution ?

What is a true solution?

What is an ideal solution ?

What is isotonic solution ?

What is a saturated solution ?

What is collodion solution ?

What is ppm of a solution ?

What is a hypotonic solution ?

What are buffer solutions ? Give examples.

What are ideal solutions ? Give examples.

A white solid is either Na_(2)O or Na_(2)O_(2) . A piece of red litmus turns white when it is dipped into a freshly made aqueous solution of the white solid. What is the white solid ?