NEET Chemistry Chemistry in Everyday Life Questions Solved


Explain the following terms with one example in each case :                  (3 maks)

(i) Food preservatives                        (ii) Enzymes                        (iii) Detergents

 (i) Food Preservatives : They are used to prevent spoilage of food due to microbial growth.

      Example : Table salt, vegetable oils, sodium benzoate etc.


 (ii) Enzymes : The enzymes may be defined as bio-catalysts which catalyse the bio-chemical

      reactions in the living organisms.

      Example : Pepsin and Amylase.


(iii) Detergents : They may be defined as ammonium, sulphonate or sulphate salts of long chain

      hydrocarbons containing 12-18 carbon atoms.

      Example : Sodium lauryl sulphate.

      Unlike soaps they are non-biodegradable and hence cause water pollution but they can be

      conveniently used even in hard water.

Difficulty Level:

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