Advertisements
Advertisements
प्रश्न
Mention the contribution of the following scientists :
- Antoine Lavoisier
- Robert Boyle
- Joseph Priestley
- Sir W. Ramsay
Advertisements
उत्तर
- Antoine Lavoisier
Conducted experiments to know the nature of combustion. - Robert Boyle
Discovered a rule about how gases behave - Joseph Priestley
Prepared oxygen by heating red mercuric oxide with infra red rays from Sun and proved that air was not an element. - Sir W. Ramsay
Sir William Ramsay, alongwith Lord Raleigh discovered ar-gon; a noble gas, which is also called as rare gas or inert gas. He also prepared neon, krypton and xenon by distillation of liquid air. In 1910, he discovered radon.
APPEARS IN
संबंधित प्रश्न
Write the chemical name of The white insoluble solid formed on the reaction of carbon dioxide with lime water.
State four steps to be taken to control air pollution.
Tick (√) the correct alternative from the choice given for the following statement.
The gases which cause acid rain are
Tick (√) the correct alternative from the choice given for the following statement.
Photosynthesis is a process in which plants
Tick (√) the correct alternative from the choice given for the following statement.
The substance which accelerates the speed of a reaction without itself undergoing any change is called
With whom should I pair up?
| Group A | Group B | ||
| (1) | Air | (a) | Excretion |
| (2) | Water | (b) | Scattering of light |
| (3) | Soil | (c) | Plasticity |
Fill in the blank:
Nitrogen of the air is utilized by plants for formation of _____.
The layer of air around the earth is known as ______.
Air has no ______ & ______.
Cool and soothing wind: Breeze.
uproot trees wind: ______.
