Advertisements
Advertisements
प्रश्न
Name the scientists who discovered the following:
Elements
उत्तर
A scientist who discovered Elements:
Antoine Lavoisier was a French nobleman. He revolutionized chemistry. Lavoisier named the elements carbon, hydrogen, and oxygen and discovered the role of oxygen in combustion and respiration for which he is most noted. He established that water is a compound and helped to continue the transformation of chemistry from a qualitative science to a quantitative one
APPEARS IN
संबंधित प्रश्न
Give two examples of the following substance.
Chemical war weapons
Name the scientists who discovered the following:
Atoms
_____________ help to increase the production of food.
Write True or False against the following statement.
D.D.T. is an important fertiliser:
Choose the correct alternative from the choices given below for the following statement:
Mortar is used as a
Explain in brief the importance of Chemistry in the production of various products.
Explain the term ‘cosmetics’ ‘talc’. Name a few main ingredients in cosmetics the role they play.
Give reasons for the following
Aspirin is one of the most widely used medications – globally.
Give reasons for the following
Ordinary soap is wasted in hard water.
Give reasons for the following
Cosmetics may contain preservatives, as one of their ingredients.