Answer :
Final answer:
Zyklon B was the substance used by the Nazis to gas Jews during World War II.
Explanation:
Zyklon B was the substance used by the Nazis to gas Jews during World War II. It was a derivative of an insecticide created by Fritz Haber, a German chemist of Jewish descent. Zyklon B contained hydrogen cyanide, which was released when the pellets inside the canisters were exposed to air.
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