Give a chemical test to distinguish between HCl and Cl2.
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Chlorine (Cl2) turns moist starch iodide paper blue black whereas HCl does not.Cl2 + 2KI ⟶ 2KCl + I2Starch + I2 ⟶ Blue black colour
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Give a chemical test to distinguish between CO2 and SO2.
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Give a chemical test to distinguish between SO2 and Cl2.