1.Acetic acid
2.Arsenious acid ( Arsenic album)
3.Citric acid
4.Flouric acid
5.Hydrocyanic acid
6.Lactic acid
7.Malic acid
8.Nitric acid
9.Nitromuriatic acid
10.Oxalic acid
11.Phosphoric acid
12.Picric acid
13.Silicic acid ( Silica)
14.Sulphuric acid

General chemical and physical character:
They are electronegative. They readily combine with electropositive substances like sodium and potassium. Most of them redden litmus paper. Most of them are sour.

Origin:
They are derived from the mineral and vegetable kingdoms. 
For example; 
Acids derived from mineral kingdom(Mineral acids) 
Arsenious acid
Flouric acid
Muriatic acid
Nitric acid
Phosphoric acid
Silicic acid(Silica)
Sulphuric acid

Acids derived from vegetable kingdom (Organic acid) 
1.Acetic acid
2.Lactic acid
3.Hydrocyanic acid
4.Lactic acid
5.Malic acid
6.Oxalic acid 

General features of acids (Physiological and Medicinal effects  

They decrease the acid secretions and increase the alkaline secretions
of the body. For example, if a quantity of Citric acid is taken into the stomach, it will diminish the secretion of gastric juice. On the other  hand it will increase the secretion of saliva which is alkaline in  nature.
Antidotal action and complementary action to certain drugs:
1... Vinegar retards the action of Belladonna, but lemonade aids the action of the remedy. 2.Antimonium crudum will not tolerate acids , but we can use tamarind water.   

Dyspepsia:
Vegetable acids are useful in dyspepsia. e.g.: Allow the patient to drink lemonade before meals and we can find that the usual heart burn and sour rising after eating are diminished. Hydro cyanic acid, Muriatic acid, and Lactic acid favor digestion. Some person are greatly relieved by drinking sour milk.  
Antidote for intoxication: Vinegar has been used as an antidote for intoxication.

Corrosive action: 
They will produce discharges which are acrid and excoriating. E .g; .Lzz

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