DISCOVERY OF OXYGEN

 Oxygen was discovered by

1.Rutherford
2.William Ramsay
3.Neil Bohr
4.Lavoisier

ANSWER: Lavoisier

The discovery of oxygen is attributed to several scientists over a period of time rather than a single event. However, the recognition of oxygen as a distinct element and its role in supporting combustion and respiration began to emerge in the late 17th and early 18th centuries.

One of the key figures in the discovery of oxygen was the English scientist Joseph Priestley. In 1774, Priestley conducted experiments in which he isolated a gas produced by heating mercuric oxide. He found that this gas could sustain combustion and support the respiration of small animals. He called this gas "dephlogisticated air" as per the phlogiston theory, which was a prevalent chemical theory at the time.

Simultaneously, the Swedish chemist Carl Wilhelm Scheele also discovered oxygen independently around the same time. In 1771–1772, Scheele conducted experiments on various substances, including heating mercuric oxide, which led him to isolate oxygen. However, he did not publish his findings until 1777, after Priestley's work had become widely known.

Another scientist, Antoine Lavoisier, is often credited with giving oxygen its name and providing a more accurate explanation of its role in combustion and respiration. Lavoisier demonstrated through meticulous experiments that combustion involves the combination of a substance with oxygen from the air. He also showed that animals consume oxygen during respiration and produce carbon dioxide.

These collective efforts laid the groundwork for the discovery and understanding of oxygen as a vital element in chemistry and biology