Carbon dioxide was discovered by_______?

A. Niels Bohr
B. Amedeo Avogadro
C. Joseph Black
D. None of Above

Joseph Black, a Scottish chemist and physician, first identified carbon dioxide in the 1750s. At room temperatures (20-25 oC), carbon dioxide is an odourless, colourless gas, which is faintly acidic and non-flammable. Carbon dioxide is a molecule with the molecular formula CO2.