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प्रश्न
Name the scientists who discovered the following:
Elements
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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
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संबंधित प्रश्न
Name the chemicals which help in increasing food production.
What is the contribution of chemistry in following field?
Clothing
What is the contribution of chemistry in following field?
Cosmetics
What is the contribution of chemistry in following field?
Medicines
_____________ help to increase the production of food.
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
Ordinary soap is wasted in hard water.
Give reasons for the following
Polyester is added to natural fiber cotton, to give terylene.
Give reasons for the following
All medicines must be taken under proper doctors' supervision and in the correct dose.
