Multiple choice

Who discovered the evolution of bubbles of hydrogen and oxygen upon passage of electric current through the electrodes immersed in water?

  1. Robert Hooke

  2. William Nicholson

  3. Einstein

  4. Edwin Aldrin

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

William Nicholson and surgeon Anthony Carlisle discovered electrolysis of water in 1800, observing bubbles of hydrogen and oxygen forming at electrodes when electric current passed through water. This demonstrated that water is composed of hydrogen and oxygen.