Question

The chemical composition of pigments chlorophyll and carotenoids for the first time was given by

• A. Willstatter and Stoll
• B. Mayer and Andreson
• C. Robert Mayer
• D. Senebier

Answer 1

The correct option is A Willstatter and Stoll

Richard Martin Willsttter, was a German organic chemist whose study of the structure of plant pigments, chlorophyll included, won him the 1915 Nobel Prize for Chemistry. He studied the structure of alkaloids (colorless, complex, and bitter organic compounds), anthocyanins (red, blue, and violet plant pigments), and chlorophyll (the green, light-absorbing catalyst in plants). He also corrected mistakes in the scientific understanding of cocaine's atomic structure and synthesized that drug, and pioneered the technique of chromatography ("color-writing"), developed independently by Willsttter and his student Arthur Stoll (1887-1971) in the 1920s.

So, the correct answer is option A.