On the basis of
a) composition:– elements, compounds and mixtures
b) state:– solids, liquids and gases
c) solubility:– suspensions, colloids and solutions
Types of mixtures:– homogeneous and heterogeneous
Types of compounds:– covalent and ionic
To know more about Classification of Matter,
What Is an Acid and a Base?
* Ionisable and non-ionisable compounds An ionisable compound when dissolved in water or in its molten state, dissociates into ions almost entirely.Example: NaCl, HCl, KOH, etc.
* A non-ionisable compound does not dissociate into ions when dissolved in water or in its molten state.Example: glucose, acetone, etc.
Physical test
Given are two possible physical tests to identify an acid or a base.
a. Taste
An acid tastes sour whereas a base tastes bitter.
The method of taste is not advised as an acid or a base could be contaminated or corrosive.
b. Effect on indicators by acids and bases
An indicator is a chemical substance which shows a change in its physical properties, mainly colour or odour when brought in contact with an acid or a base.
Below mentioned are commonly used indicators and the different colours they exhibit: