Hydrogen gas is evolved when zinc reacts with dilute hydrochloric acid whereas copper does not. Justify.
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46
Answer:
Zinc reacts with hydrochloric acid to liberate Hydrogen gas as it is more reactive than Hydrogen and hence, displace it. Copper is less reactive when compared to Hydrogen and hence cannot displace it. The same can be understood by looking at the activity series of metals.
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1
Answer:
zinc is more reactive compared to hydrogen and copper less reactive compared to hydrogen. That is the reason why H2 gas is evolved when Zn reacts with H2O wheras Cu doesn't.
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