Redox Reactions & Electrochemistry — Advanced + PYQ-Style MCQs

Practice 100 questions on Redox Reactions & Electrochemistry — Advanced + PYQ-Style MCQs. Includes: From the electrochemical series: E°(Al³⁺/Al) = −1.66…; The charge required to deposit 1 mole of aluminium…; What is the oxidation number of O in OF₂?. Free quiz on NoteTube.

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1.
**Assertion (A):** In both galvanic and electrolytic cells, oxidation occurs at the anode and reduction at the cathode. **Reason (R):** In both cells, the anode is the negative terminal.
2.
**Assertion (A):** Galvanized iron does not rust even after the zinc coating is scratched. **Reason (R):** Zinc (E° = −0.76 V) acts as a sacrificial anode, oxidizing preferentially and protecting iron (E° = −0.44 V).
3.
For a cell with n = 1, a graph of E (y-axis) vs. log Q (x-axis) is plotted. The slope of this graph is:
4.
On a graph of Λm vs. √C for a strong electrolyte, the y-intercept represents:
5.
**Assertion (A):** The EMF of a galvanic cell decreases as it discharges. **Reason (R):** As the cell discharges, the reaction quotient Q increases, and from the Nernst equation, increasing Q decreases EMF.

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