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MHT CET 202621 AprilMorning Shift
Exam
MHT CET
Year
2026
Date
21 April
Shift
Morning Shift
Subject
Chemistry
Chapter
Electrochemistry

MHT CET 2026 · 21 April · Morning Shift · Chemistry · Electrochemistry

Which of the following elements has positive standard reduction...

Which of the following elements has positive standard reduction potential?

Options

  1. AAl
  2. BSn
  3. CCu
  4. DZn

Correct answer

C. Cu

Step-by-step solution

The standard reduction potentials of the given elements are:

EAl3+/Al∘=−1.66 VE^{{}^{\circ}}_{\text{Al}^{3+}/\text{Al}} = -1.66 \text{ V}

ESn2+/Sn∘=−0.14 VE^{{}^{\circ}}_{\text{Sn}^{2+}/\text{Sn}} = -0.14 \text{ V}

ECu2+/Cu∘=+0.34 VE^{{}^{\circ}}_{\text{Cu}^{2+}/\text{Cu}} = +0.34 \text{ V}

EZn2+/Zn∘=−0.76 VE^{{}^{\circ}}_{\text{Zn}^{2+}/\text{Zn}} = -0.76 \text{ V}

Copper (Cu) is the only element among the given options that has a positive standard reduction potential.

Answer: Cu
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