Chemistry
The chemicals prescribed by a doctor in treatment of infectious diseases are called:
- antigens
- preservatives
- antibiotics
- fertilisers
Related Questions
Mortar is used as:
- a plastic material
- a building material
- an insecticide
- a medicine
Urea is an important:
- fuel
- preservative
- fertiliser
- food item
(a) …………… deals with the study of matter and the changes it undergoes.
(b) …………… help to increase the production of food.
(c) Food items like jams and pickles are protected by using ……………
(d) L.P.G. is used for ……………
(e) Inert gases were discovered by ……………
Write "True" of "False" against the following statements and correct the false ones.
(a) Chemistry plays an important role in our national economy. ……………
(b) Antibiotics are used as preservatives. ……………
(c) D.D.T. is an important fertiliser. ……………
(d) Gunpowder is an insecticide. ……………
(e) Enzymes secreted by our body are chemicals. ……………