Advertisements
Advertisements
प्रश्न
Name the scientists who discovered the following:
Oxygen
Advertisements
उत्तर
A scientist who discovered Oxygen: Joseph Priestly
APPEARS IN
संबंधित प्रश्न
Give two examples of the following substance.
Chemical war weapons
How is chemistry helpful in improving the health of human beings?
Name the chemicals which help in increasing food production.
What is the contribution of chemistry in following field?
Industry
Food items like jams and pickles are protected by using ___________.
Fill in the blank:
L.P.G. is used for ___________
Write True or False against the following statement.
Antibiotics are used as preservatives:
Choose the correct alternative from the choices given below for the following statement:
The chemicals prescribed by a doctor in the treatment of infectious diseases are called
Give reasons for the following
Titanium dioxide is an important ingredient in cosmetics.
Give reasons for the following
Cosmetics may contain preservatives, as one of their ingredients.
