State a chemical teaction showing evvolution of gas
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In a chemical reaction, the gas is evolved as product. Most of the gas evolution reactions can be carried out in fume chamber. some chemical reactions are characterized by change in color. Citric acid reacts with potassium permanganate, then the purple colour disappears.
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Zn + H2SO4 ——> ZnSO4 + H(↑)
Here is the evolution of Hydrogen gas.
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