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On This Day – June 11 : The Scottish chemist Joseph Black discovered carbon dioxide on this day in 1754.
Carbon dioxide (CO2) was discovered by Joseph Black, a Scottish chemist and physician, in the mid-18th century. Black is credited with identifying carbon dioxide as a distinct gas. He observed that when calcium carbonate (chalk) is heated, it releases a gas that can extinguish a flame and form a white precipitate when passed through limewater (calcium hydroxide solution).
Joseph Black’s experiments and observations laid the foundation for understanding carbon dioxide as a separate gas entity and its properties.