The standard reduction potentials of Cu $^{+ 2}$ , Ag $^{+}$ , Hg $^{+ 2}$ and Mg $^{+ 2}$ are 0.34V, +0.80V ,+0.79V and 2.37V respectively. With increasing voltage, the sequence of deposition of metals on the cathode from an aqueous solution containing all those ion is:

Ag, Hg, Mg, Cu

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Cu, Hg, Ag, Mg

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Ag, Hg, Cu, Mg

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Cu, Hg, Mg, Ag

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Solution

The correct option is A Ag, Hg, Cu, Mg
As voltage increases, the metal which reduces more easily gets deposited first. SRP value are directly related to each reduction
$∴$ Order of deposition is decreasing order of SRP value
Hence, order is first Ag, then Hg then Cu and then Mg

Correct option is C

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Q. An aqueous solution containing one mole per litre of each

C u (N O_{3})_{2}, A g N O_{3}, H g_{2} (N O_{3})_{2}

and

M g (N O_{3})_{2}

, is being electrolysed by using inert electrodes. The values of standard electrode potentials in volts (reduction potentials) are

A g / A g^{+} = + 0.80, 2 H g / H g_{2}^{2 +} = + 0.79, C u / C u^{2 +} = + 0.34, M g / M g^{2 +} = - 2.37

with increasing voltage, the sequence of deposition of metals on the cathode will be

A solution containing 1 mol per litre of each $C u (N O_{3})_{2}, A g N O_{3},$ and $H g_{2} (N O_{3})_{2}$ is being electrolyzed by using inert electrodes. The values of standard electrode potentials in volts (reduction potential) are
$A g | A g^{⨁} = + 0.80, 2 H g | H g_{2}^{2 +} = + 0.79$
$C u | C u^{2 +} = + 0.34, M g | M g^{2 +} = - 2.37$
with increasing voltage, the sequence of deposition of metals at the cathode will be
(IIT-JEE, 1984)

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The standard reduction potentials of Cu+2, Ag+, Hg+2 and Mg+2 are 0.34V, +0.80V ,+0.79V and 2.37V respectively. With increasing voltage, the sequence of deposition of metals on the cathode from an aqueous solution containing all those ion is:

The correct option is A Ag, Hg, Cu, MgAs voltage increases, the metal which reduces more easily gets deposited first. SRP value are directly related to each reduction ∴ Order of deposition is decreasing order of SRP valueHence, order is first Ag, then Hg then Cu and then MgCorrect option is C

The standard reduction potentials of Cu $^{+ 2}$ , Ag $^{+}$ , Hg $^{+ 2}$ and Mg $^{+ 2}$ are 0.34V, +0.80V ,+0.79V and 2.37V respectively. With increasing voltage, the sequence of deposition of metals on the cathode from an aqueous solution containing all those ion is: