Multiple choice

In 1775, a scientist proved that air is a mixture of two gaseous substances. Name the scientist.

  1. Deli

  2. Lavoisier

  3. Darwin

  4. Priestley
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lavoisier demonstrated in 1775-1777 that air is a mixture of gases, primarily nitrogen and oxygen. His experiments showed that combustion removed oxygen from air, leaving behind what he called 'azote' (nitrogen). While Priestley and Scheele had discovered oxygen earlier, Lavoisier correctly identified air as a mixture and named the components.

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