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Electrochemistry

Short Answer Type

231. Which factor makes secondary cells more acceptable as a source of power?

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232. Write Nernst equation for single electrode potential.

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233. Why is the equilibrium constant k related to only E°_cell and not E_cell.

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234. How does the molar conductivity of KCl solution vary with increasing concentration?

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235. Give an example of fuel cell.

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236. Write the symbolic notation for standard hydrogen electrode and its potential.

A half-cell called standard hydrogen electrode
represented by Pt(s) l H2(g) l H+(aq), is assigned
a zero potential at all temperatures corresponding to the reaction

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237. What is a galvanic cell? What type of reactions give rise to electric current in a galvanic cell and how?

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238. What information is conveyed by the cell rotation given below?
Cu(s) | Cu²⁺ (aq) (0.1 M) || Ag⁺ (aq) (0.2 M) | Ag(s)

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239. What is a salt bridge and what function does it save in a galvanic cell?

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240. What is meant by ‘standard electrode potential’ on the hydrogen scale?

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