Multiple choice

The English chemist who discovered the laughing gas (nitrous oxide) is

  1. Humphrey Davy

  2. Antonie Lavosier

  3. Blaise Pascal

  4. Werner Heisenberg

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A Correct answer
Explanation

Humphry Davy discovered nitrous oxide's anesthetic properties (calling it laughing gas) and also isolated several elements using electrolysis. Lavoisier worked on oxygen and combustion, Pascal studied pressure, and Heisenberg developed quantum uncertainty principle.