CBSE 2023 · Region 3 · Set 1 · Q21 · 2 marks
Define fuel cell and write its two advantages.Using $\displaystyle \mathrm{E}^{\circ}$ values of X and Y given below, predict which is better for coating the surface of Iron to prevent corrosion and why ? Given : $\displaystyle \mathrm{E}_{\mathrm{X}^{2+} / \mathrm{X}}^{\circ}=-2.36 \mathrm{~V}$ \[\begin{aligned} & \mathrm{E}_{\mathrm{Y}^{2+} / \mathrm{Y}}^{\circ}=-0.14 \mathrm{~V} \\ & \mathrm{E}_{\mathrm{Fe}^{2+} / \mathrm{Fe}}^{\circ}=-0.44 \mathrm{~V} \end{aligned} \]
Define fuel cell and write its two advantages.
Using $\displaystyle \mathrm{E}^{\circ}$ values of X and Y given below, predict which is better for coating the surface of Iron to prevent corrosion and why ? Given : $\displaystyle \mathrm{E}_{\mathrm{X}^{2+} / \mathrm{X}}^{\circ}=-2.36 \mathrm{~V}$ \[\begin{aligned} & \mathrm{E}_{\mathrm{Y}^{2+} / \mathrm{Y}}^{\circ}=-0.14 \mathrm{~V} \\ & \mathrm{E}_{\mathrm{Fe}^{2+} / \mathrm{Fe}}^{\circ}=-0.44 \mathrm{~V} \end{aligned} \]
Marking-scheme solution
(a) A Galvanic cell that converts the energy of combustion of fuel directly to electrical energy.
Advantages: ($\displaystyle 1$) More efficient.
(2) Pollution free.
ElectrochemistryFuel CellsApplyvery_short_answermedium
More from Electrochemistry
- Kohlrausch gave the following relation for strong electrolytes: Λ m=Λ m^°-A √C Which of the following…2025 · asked 4×
- (i) What should be the signs (positive/negative) for E^° Cell and Δ G^° for a spontaneous redox reaction…2023 · asked 3×
- Batteries and fuel cells are very useful forms of galvanic cell. Any battery or cell that we use as a source…2024 · asked 3×
- (i) Calculate emf of the following cell at 25°C: Zn( s) Zn^2+(0 · 001 M) Cd^2+(0 · 1 M) Cd( s) Given: E Zn^2+…2024 · asked 3×
- In a galvanic cell, chemical energy of a redox reaction is converted into electrical energy, whereas in an…2024 · asked 3×
- (i) For a galvanic cell, the following half reactions are given. Decide, which will remain as reduction…2025 · asked 3×
- Write the cell reaction and calculate the e.m.f. of the following cell at 298 K: ( 3 + 2 = 5 ) Sn(s)…2025 · asked 3×
- Four half reactions I to IV are shown below: I. 2 Cl l^- → Cl 2+2 e^- II. 4 OH^- → O 2+2 H 2 O+2 e^- III.…2023 · asked 3×
CBSE Class 12 Chemistry past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.