During the chemical reaction between dilute hydrochloric acid and zinc metal , a gas is evolved . How the presence of the gas can be determined ?
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The metal zinc readily reacts with hydrochloric acid to produce hydrogen gas (H2) and zincchloride (ZnCl2). ... The zinc reactionproduces the heat and hence has the negative enthalpy.
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hydrogen gas envolved during reaction it can bhe determine by poping up of a lighted stick when brought near test tube
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