NCERT Class XII Chemistry
Chapter - Electrochemistry
Questions with Solutions
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Question : 3
Total: 32
Depict the galvanic cell in which the reaction :Z n ( s ) + 2 A g ( a q ) + → Z n ( a q ) 2 + + 2 A g ( s )
Further show:
(i) Which of the electrode is negatively charged?
(ii)The carriers of the current in the cell.
(iii) Individual reaction at each electrode.
Further show:
(i) Which of the electrode is negatively charged?
(ii)The carriers of the current in the cell.
(iii) Individual reaction at each electrode.
Solution:
The cell will be represented as
Z n ( s ) | Z n ( a q ) 2 + | | A g ( a q ) + | A g ( s )
(i) Anode, i.e., zinc electrode will be negatively charged.
(ii) Electrons are current carriers. The current will flow from silver to zinc in the external circuit.
(iii) At anode :Z n ( s ) → Z n 2 + ( a q ) + 2 e −
At cathode :A g + ( a q ) + e − → A g ( s )
(i) Anode, i.e., zinc electrode will be negatively charged.
(ii) Electrons are current carriers. The current will flow from silver to zinc in the external circuit.
(iii) At anode :
At cathode :
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