Use standard reduction potentials to calculate the equilibrium constant for the reaction:
Cu²⁺ (aq) + Ni(s) → Cu(s) + Ni²⁺ (aq)
Hint: Carry at least 5 significant figures during intermediate calculations to avoid round off error when taking the antilogarithm.

Value of equilibrium constant is

Explanation:

Oxidation: ;

Reduction: ;

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Overall:

We know,

where, k is equilibrium constant, n is no. of electron exchanged, 1F = 96500 C/mol, R is gas constant and T = 298 K

So,

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.