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Electrochemistry — NEET Chemistry MCQs

30 questions written by hand against the NCERT chapter. Every wrong option is explained, not just the right one.

30questions
10/14/6easy / medium / hard
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Sample questions from this chapter

What energy conversion occurs in a galvanic cell?
  1. Chemical energy of a spontaneous reaction becomes electrical energy ✓
  2. Electrical energy drives a non-spontaneous chemical reaction
  3. Thermal energy alone becomes nuclear energy
  4. Mechanical energy separates an electrolyte into ions
Answer: A. A galvanic cell converts the Gibbs energy released by a spontaneous redox reaction into electrical work. The electrolytic-cell description is the closest reversed-process trap.
Why not B: That describes an electrolytic cell powered by an external source.
Why not C: No nuclear transformation is involved in an electrochemical cell.
Why not D: Ion separation is not the defining energy conversion of a galvanic cell.
For Zn|Zn2+||Cu2+|Cu, E°Cu2+/Cu = +0.34 V and E°Zn2+/Zn = -0.76 V. What is E°cell?
  1. -1.10 V
  2. -0.42 V
  3. +1.10 V ✓
  4. +0.42 V
Answer: C. E°cell = 0.34 − (−0.76) = +1.10 V. The −1.10 V trap reverses electrode order, while +0.42 V ignores the negative sign of zinc's reduction potential.
Why not A: This has the correct magnitude but reverses cathode-minus-anode.
Why not B: This adds the two signed reduction potentials instead of subtracting the anode value.
Why not D: This subtracts the magnitudes 0.76−0.34 rather than applying their signs.
For Zn + Cu2+ → Zn2+ + Cu at 298 K, E° = 1.10 V. What is E when [Zn2+] = 1.0 M and [Cu2+] = 0.010 M? Use 0.0591/n with n = 2.
  1. 1.041 V after subtracting 0.0591 V ✓
  2. 1.159 V after adding 0.0591 V
  3. 1.100 V because solids fix the emf
  4. 0.982 V after subtracting 0.118 V
Answer: A. Q = 1.0/0.010 = 100 and log Q = 2; E = 1.10 − (0.0591/2)(2) = 1.041 V. The 0.982 V trap forgets the two-electron denominator.
Why not B: Q = 100 is greater than one, so the Nernst correction lowers rather than raises E.
Why not C: Solid activities are fixed, but the two ion concentrations still affect emf.
Why not D: This omits division by n and subtracts the full 0.0591 log100 term.

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Questions

How many NEET questions are there on Electrochemistry?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 12 chapter.

Is this NEET Chemistry chapter test free?

Yes. Every chapter test is free with no login, and you get your all-India rank on every one. Nothing on the site is on sale right now.

Do the questions explain the wrong options?

Yes — every distractor carries its own explanation naming the specific misconception that makes a student pick it. That is the part most question banks skip, and it is the part that changes your next attempt.