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Chapter 7: Problem 4
State whether the following statements are true or false. The negative sign of the reduction potential indicates that reduction occurs at that electrode when connected to the standard hydrogen electrode.
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State whether the following statements are true or false. Batteries are voltaic cells.
State whether the following statements are true or false. Electrolysis brings about a chemical change.
In a Daniel cell, if \(A\left(E_{0}=-0.76 v\right)\) and \(B(=-2.36 v)\) half- cells are taken then (a) \(\mathrm{B}\) acts as an anode (b) \(\mathrm{A}\) acts as an anode (c) \(\mathrm{B}\) acts as a cathode (d) cannot be predicted
The order of ease of oxidation of the ions \(\mathrm{F}^{-}, \mathrm{OH}^{-}\) \(\mathrm{Br}^{-}, \mathrm{SO}_{4}^{2-}\) is (a) \(\mathrm{SO}_{4}^{2-}>\mathrm{F}^{-}>\mathrm{Br}^{-}>\mathrm{OH}^{-}\) (b) \(\mathrm{SO}_{4}^{2-}<\mathrm{Br}^{-}<\mathrm{OH}^{-}<\mathrm{F}\) (c) \(\mathrm{SO}_{4}^{2-}>\mathrm{F}^{-}>\mathrm{Br}^{-}>\mathrm{OH}^{-}\) (d) \(\mathrm{OH}^{-}<\mathrm{Br}^{-}<\mathrm{F}^{-}<\mathrm{SO}_{4}^{2-}\)
In the electroplating of iron by nickel, nickel sulphate solution is taken as an electrolyte. What is the acid that is added to the electrolyte during the process? (a) \(\mathrm{HCl}\) (b) \(\mathrm{HCN}\) (c) \(\mathrm{HNO}_{3}\) (d) \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
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