Which of the following pairs will not produce | vedclass

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(A) The reactivity series of metals determines whether a metal can displace hydrogen from an acid or water. $Cu$ (Copper) is placed below hydrogen in

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$Cu + HCl$ (dil.)

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(A) The reactivity series of metals determines whether a metal can displace hydrogen from an acid or water. $Cu$ (Copper) is placed below hydrogen in the electrochemical series,meaning it has a lower reduction potential than hydrogen. Therefore,$Cu$ cannot displace hydrogen from dilute $HCl$. In contrast,$Fe$,$Mg$,and $Na$ are more reactive than hydrogen and will react to produce $H_2$ gas. Thus,the pair $Cu + HCl$ (dil.) will not produce dihydrogen gas.

Which of the following pairs will not produce dihydrogen gas?

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