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Gibb's Energy and Nernst Equation

Which of the ...

Question

Which of the following reactions will not occur?

M g + H_{2} S O_{4} d i l \to M g S O_{4} + H_{2}

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C u + 2 H C l d i l \to C u C l_{2} + H_{2}

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2 A l + 6 H C l d i l \to 2 A l C l_{3} + 3 H_{2}

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F e + 2 H C l d i l \to F e C l_{2} + H_{2}

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Solution

The correct option is A $C u + 2 H C l d i l \to C u C l_{2} + H_{2}$

The reaction $C u + 2 H C l d i l \to C u C l_{2} + H_{2}$ will not occur. It is non-spontaneous reaction.

$C u$ lies below the hydrogen in the reactivity series therefore cannot displace hydrogen. Elements that lies above hydrogen in the reactivity series can displace hydrogen.

Hence, the correct option is $B$

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