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ICSE Class 6 Answered

Write short notes on development if chemistry a historical view  
Asked by Sathyamano72 | 05 Jul, 2020, 09:47: PM
answered-by-expert Expert Answer

Period

Scientist


          Discovery                     

8th century

Alchemists

Nitric acid was named aqua fortis.

9th century

 -

Sulphuric acid was first mentioned.

1630

Van Helmont

Carbon dioxide was discovered.

1772

Daniel Rutherford

Nitrogen gas was discovered.

1774

Joseph Priestly

Oxygen and ammonia were discovered.

1776

Henry Cavendish

Hydrogen gas was first prepared.

1776

De Lassone

Carbon monoxide was first prepared.

1777

Lavoisier

The elementary nature of sulphur was      recognised.

1807

John Dalton

Atomic theory was postulated.

19th century

 -

Modern theory was established.

Answered by Ramandeep | 06 Jul, 2020, 09:53: PM
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