Write the name of the cel which is generally used in hearing aids. Write the reactions taking place at the anode and the cathode of this cell.

Write the name of the cel which is generally used in hearing aids. Wri

1.	Write the name of the cel which is generally used in hearing aids. Write the reactions taking place at the anode and the cathode of this cell.
Answer» Mercury cell is used in hearing aids Reaction: At Anode: `Zn(s)+2OH^(-)toZnO(s)+H_(2)O(l)+2e^(-)` At Cathode: `underline(" "HgO(s)+H_(2)O(l)+2e^(-)toHg(l)+2OH^(-)" ")` `underline(" "Zn(s)+HgO(s)toZnO(s)+Hg(l)" ")`

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(i) Arrange the following compounds in an increasing order of basic strength : `C_(6)H_(5)NH_(2), C_(6)H_(5)N(CN_(3))_(2), (C_(2)H_(5))_(2)NH and CH_(3)NH_(2)` (ii) Arrange the following compounds in a decreasing order of `pK_(b)` values: `C_(2)H_(5)NH_(2), C_(6)H_(5)NHCH_(3), (C_(2)H_(5))_(2) NH and C_(6)H_(5)NH_(2)`
Rerrange the following in an increasing order of their basic strengths: `C_(6)H_(5)NH_(2),C_(6)H_(5)N(CH_(3))_(2),(C_(6)H_(5))_(2)` NH and `CH_(3)NH_(2)`.
(b) Estimate the minimum potential difference needed to reduce `AI_(2)O_(3)` at `500^(@)C` The gibbs energy change for the decomposition reaction `2/3AI_(2)O_(3)rarr4/3AI+O_(2)`is 960 kJ (F=96500 C `mol^(-1))`

Write the name of the cel which is generally used in hearing aids. Write the reactions taking place at the anode and the cathode of this cell.

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