ICSE Class 6 Answered
Write short notes on development if chemistry a historical view
Asked by Sathyamano72 | 05 Jul, 2020, 09:47: PM
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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