What are the following substances ? Give one exmaple of each. (3 marks)
(i) Food preservatives
(ii) Synthetic detergents
Related Videos :-
(i) Food preservatives : They are used to prevent spoilage of food due to microbial growth.
Example : Table salt, vegetable oils, sodium benzoate etc.
(ii) Synthetic detergents : Synthetic detergents are cleansing agents which have all the proper-
ties of soap but which actually do not contain any soap.
Example : Sodium lauryl sulphate ( or any one other )
(iii) Antacids : The substances which neutralize the excess acid and raise the pH to an appropriate
level in the stomach are called antacids.
Example : Sodium bicarbonate, Ranitidine etc.