Explain clearly to me please...

Dear Student,
This question is related to the reactivity of metal in the reactivity series. Metals that are more reactive than hydrogen reacts with dilute acids to form hydrogen gas.
Zinc and Iron are both more reactive than hydrogen whereas Copper and Gold are both less reactive than hydrogen.
Hence both Copper (Cu) and gold (Au) do not react with dilute HCl.

Correct options will be (C) and (D)


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