PROPERTIES OF ACIDS.
(A) PHYSICAL PROPERTIES OF ACIDS
Acids have a characteristic sour taste
Most acids are colourless liquids
Mineral acids are odourless. Organic acids have characteristic smell
All acids have pH less than 7
All acids turn blue litmus paper red, methyl orange red and phenolphthalein colourless.
All acids dissolve in water to form an acidic solution. Most do not dissolve in organic solvents like propanone, kerosene, tetrachloromethane, petrol.