Chapter 7: Problem 1
State whether the following statements are true or false. Electrolysis brings about a chemical change.
Chapter 7: Problem 1
State whether the following statements are true or false. Electrolysis brings about a chemical change.
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Get started for freeState 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.
\(100 \mathrm{ml}\) of \(0.05 \mathrm{M}\) aqueous \(\mathrm{CuSO}_{4}\) solution is subjected to electrolysis. Calculate the quantity of electricity required for the deposition of entire copper at the cathode. (a) \(0.005 \mathrm{~F}\) (b) \(0.01 \mathrm{~F}\) (c) \(0.1 \mathrm{~F}\) (d) \(0.05 \mathrm{~F}\)
Fill in the blanks. The extent to which an electrolyte can dissociate into ions is called ___.
Pairs of electrodes and their corresponding standard electrode potentials are given. Arrange the cells constructed by these electrodes in increasing order of emf values. (1) Electrode \(\rightarrow \mathrm{A}, \mathrm{E}^{\circ}=-2.92 \mathrm{~V}\) and Electrode \(\rightarrow\) \(\mathrm{B}, \mathrm{E}^{\circ}=-2.71 \mathrm{~V}\) (2) Electrode \(\rightarrow \mathrm{C}, \mathrm{E}^{\circ}=-0.760 \mathrm{~V}\) and Electrode \(\rightarrow\) \(\mathrm{D}, \mathrm{E}^{\circ}=-0.44 \mathrm{~V}\) (3) Electrode \(\rightarrow \mathrm{B}, \mathrm{E}^{\circ}=-2.71 \mathrm{~V}\) and Electrode \(\rightarrow\) \(\mathrm{D}, \mathrm{E}^{\circ}=-0.44 \mathrm{~V}\) (4) Electrode \(\rightarrow \mathrm{A}, \mathrm{E}^{\circ}=-2.92 \mathrm{~V}\) and Electrode \(\rightarrow\) \(\mathrm{C}, \mathrm{E}^{\circ}=-0.76 \mathrm{~V}\) (a) 2143 (b) 1243 (c) 2413 (d) 2431
In a voltaic cell, if iron and silver electrodes are connected with each other then current flows (a) from iron to silver outside the cell (b) from silver to iron within the cell (c) from silver to iron outside the cell (d) current does not flow in this cell
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