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 Multiple Choice QuestionsShort Answer Type

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


Secondary batteries are the rechargeable batteries. They have the advantage of being more cost-efficient over the long term, although individual batteries are more expensive. Generally, secondary batteries have a lower capacity and initial voltage, a flat discharge curve, higher self discharge rates and varying recharge life ratings.

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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 Ecell.
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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.
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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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