Easy MCQ +4 / -1 PYQ · JEE Mains 2025

The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest oxidising capacity.

  1. A <p>$E^o_{\text{Sn}^{4+}/\text{Sn}^{2+}} = +1.15 \text{ V}$</p>
  2. B <p>$E^o_{\text{Al}^{3+}/\text{Al}} = -1.66 \text{ V}$</p>
  3. C <p>$E^o_{\text{Pb}^{4+}/\text{Pb}^{2+}} = +1.67 \text{ V}$</p> Correct answer
  4. D <p>$E^o_{\text{Tl}^{3+}/\text{Tl}} = +1.26 \text{ V}$</p>

Solution

<p>Oxidizing capacity is an element's tendency to donate electrons, or the atmosphere's ability to oxidize compounds.</p> <p>A higher standard reduction potential indicates a stronger oxidizing capacity. A substance with a higher standard reduction potential is move likely to gain electrons and act as an oxidizing agent in a redon reaction. The more positive the reduction potential, the stronger the oxidizing power of a species.</p> <p>From the given options, the higher standard reduction potential is for lead $(\mathrm{Pb}) .(+1.67)$.</p> <p>so, the p-block ion with strongest oxidizing capacity is Pb (lead).</p> <p>Answer: Option 3) $E_{p_b{ }^{4+} / \mathrm{Pb}^{2+}}^0=+1.67 \mathrm{~V}$</p>

About this question

Subject: Chemistry · Chapter: Electrochemistry · Topic: Electrochemical Cells

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