Which of the following has least tendency to liberate H _ 2 from...

Which of the following has least tendency to liberate

{H}_{2}

from mineral acids?

Options

A $Cu$
B $Mn$
C $Ni$
D $Zn$

Correct answer

A. $Cu$

Step-by-step solution

Element $\left(M\right)$ ${E}^{⊝} / V$

$Mn$ $- 1 . 18$

$Ni$ $- 0 . 25$

$Cu$ $0 . 34$

$Zn$ $- 0 . 76$

As we can see that Copper is least electropositive metal among the given options. So, it does not react with dilute sulphuric acid or other mineral acids, liberating hydrogen because copper is lower in electrochemical series than hydrogen. All other metals will react with mineral acids to liberate hydrogen gas.

Practice d and f Block Elements on Quantrex Academy →

More from d and f Block Elements

Given below are two statements: Statement I: The number of pairs among [Ti^ 4+ , V^ 2+ ]… JEE Main 2026 Given below are two statements for catalytic properties of transition metals. Statement… JEE Main 2026 The correct order of first (Δ_i H_1) and second (Δ_i H_2) ionisation enthalpy values of… JEE Main 2026 The correct statements among the following are. A. Basic vanadium oxide is used in the… JEE Main 2026 Given below are two statements : Statement I: Presence of large number of unpaired… JEE Main 2026 A paper dipped in a dil. H_2SO_4 solution of ' X ' upon treatment with SO_2 gas turns… JEE Main 2026 Which of the following is NOT a physical or chemical characteristics of interstitial… JEE Main 2026 Pairs of elements with the same number of electrons in their respective 4f orbital are… JEE Main 2026 Full d and f Block Elements list All JEE Main PYQs

Element $\left(M\right)$	${E}^{⊝} / V$
$Mn$	$- 1 . 18$
$Ni$	$- 0 . 25$
$Cu$	$0 . 34$
$Zn$	$- 0 . 76$