Shikha Goel and Saleha Parvez Solutions for Chapter: Water, Exercise 4: EXAM PRACTICE

Consider the following statement regarding true solution.

I. It is homogeneous and consist of single phase.
II. The particles of solute do not settle down even after long time.
III. The size of particle of solute $< 1 \mathrm{nm}$.

Which of the following salt contain water of crystallisation?

The condition of efflorescence is

Hot aluminium oxide (${\mathrm{Al}}_2{\mathrm{O}}_3$) is a

Hardness of water is due to:

${\mathrm{CaSO}}_4 + {\mathrm{Na}}_2{\mathrm{CO}}_3 \underset{}{\to } \mathrm{X}+\mathrm{Y}$

What is the X and Y is the above reaction ?

What will happen when ferric chloride is exposed to atmosphere?

What will happen when sodium chloride exposed to atmosphere.