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Electrochemistry question

2025 · 7 Apr · Shift 2 · Q17

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JEE Main
Chemistry
Electrochemistry
2025 · 7 Apr · Shift 2 · Q17

Electrochemistry question

2025 · 7 Apr · Shift 2 · Q17

JEE MainChemistryElectrochemistryMCQ+4 / −1

Given below are two statements : 1 M aqueous solutions of each of

Cu(NO_3)_2

,

AgNO_3

,

Hg_2(NO_3)_2

,

Mg(NO_3)_2

are electrolysed using inert electrodes. Given: E0

Ag^+

/Ag = 0.80 V, E0

Hg_2^{2+}

/Hg = 0.79 V, E0

Cu^{2+}

/Cu = 0.24 V and E0

Mg^{2+}

/Mg = -2.37 V. Statement (I) : With increasing voltage, the sequence of deposition of metals on the cathode will be Ag, Hg and Cu. Statement (II) : Magnesium will not be deposited at the cathode instead oxygen gas will be evolved at the cathode. In the light of the above statements, choose the most appropriate answer from the options given below :

A
Both Statement I and Statement II are incorrect
B
Statement I is incorrect but Statement II is correct
C
Statement I is correct but Statement II is incorrect
D
Both Statement I and Statement II are correct

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