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Standard XII

Chemistry

Introduction to Oxidation and Reduction

Which one of ...

Question

Which one of the following species loses one or more electrons in the chemical reaction shown?
$M g + C u^{2 +} \to M g^{2 +} + C u$

M g^{2 +}

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C u

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C u^{2 +}

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M g

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Solution

The correct option is D $M g$
Oxidation: $M g \to M g^{2 +}$ (loss of electrons)
Reduction: $C u^{2 +} \to C u$ (gain of electrons)

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Similar questions

Q. The standard reduction potential for

M g^{2 +} / M g

- 2.37 V

and for

C u^{2 +} / C u

0.337

. The

E_{c e l l}^{o}

for the following reaction is

M g + C u^{2 +} \to M g^{2 +} + C u

Q. Based on the following reactions, arrange the metals in increasing order of their reduction potentials.

Z n + C u^{2 +} \to Z n^{2 +} + C u

M g + Z n^{2 +} \to M g^{2 +} + Z n

C u + 2 A g^{+} \to C u^{2 +} + 2 A g

Q. Refer to the following experimental data.

Half Reaction	Eo
I. $M g \to {M g}^{2 +} + 2 e^{-}$	2.37V
II. $M n \to {M n}^{2 +} + 2 e^{-}$	1.03V
III. $H_{2} \to 2 H^{+} + 2 e^{-}$	0.00V
IV. $C u \to {C u}^{2 +} + 2 e^{-}$	-0.16V

What will be the standard reduction potential for the reaction:

M g + M n^{2 +} \to M g^{2 +} + M n

For a cell, the cell reaction is $M g (s) + C u^{2 +} (a q) \to M g^{2 +} (a q) + C u (s)$ . If the S.R.P. values of $M g$ and $C u$ are $- 2.37 V$ and $+ 0.34 V$ respectively, the EMF of the cell is:

Q. Calculate the e.m.f of the following cell reaction at

298 K

{M g}_{(s)} + {C u}^{2 +} (0.0001 M) \to {M g}^{2 +} (0.001 M) + {C u}_{(s)}

The standard potential

(E^{o})

of teh cell is

2.71 V

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Which one of the following species loses one or more electrons in the chemical reaction shown?Mg+Cu2+→Mg2++Cu

The correct option is D MgOxidation: Mg→Mg2+ (loss of electrons)Reduction: Cu2+→Cu (gain of electrons)

Which one of the following species loses one or more electrons in the chemical reaction shown?
$M g + C u^{2 +} \to M g^{2 +} + C u$

The correct option is D $M g$
Oxidation: $M g \to M g^{2 +}$ (loss of electrons)
Reduction: $C u^{2 +} \to C u$ (gain of electrons)