BPSC (Bihar) Exam > BPSC (Bihar) Questions > In a dry cell , which of the following are u...
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In a dry cell , which of the following are used as a electrolyte ?
- a)Ammonium chloride and zinc chloride
- b)Sodium chloride and calcium chloride
- c)Ammonium chloride and calcium chloride
- d)Magnesium chloride and ammonium chloride
- e)None of the above/More than one of the above
Correct answer is option 'A'. Can you explain this answer?
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In a dry cell , which of the following are used as a electrolyte ?a)A...
Dry cell 
- In the primary batteries, the reaction occurs only once and after use over a period of time battery becomes dead and cannot be reused again.The most familiar example of this type is the dry cell which is used commonly in our transistors and clocks.
- The cell consists of a zinc container that also acts as anode and the cathode is a carbon (graphite) rod surrounded by powdered manganese dioxide and carbon .
- The space between the electrodes is filled by a moist paste of ammonium chloride (NH4Cl) and zinc chloride (ZnCl2 ).
- The electrode reactions are complex, but they can be written approximately as follows :
- In the reaction at cathode, manganese is reduced from the + 4 oxidation state to the +3 state. Ammonia produced in the reaction forms a complex with Zn2+ to give [Zn (NH3 ) 4 ] 2+. The cell has a potential of nearly 1.5 V.
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In a dry cell , which of the following are used as a electrolyte ?a)A...
Dry cell
- In the primary batteries, the reaction occurs only once and after use over a period of time battery becomes dead and cannot be reused again.The most familiar example of this type is the dry cell which is used commonly in our transistors and clocks.
- The cell consists of a zinc container that also acts as anode and the cathode is a carbon (graphite) rod surrounded by powdered manganese dioxide and carbon .
- The space between the electrodes is filled by a moist paste of ammonium chloride (NH4Cl) and zinc chloride (ZnCl2 ).
- The electrode reactions are complex, but they can be written approximately as follows :
- In the reaction at cathode, manganese is reduced from the + 4 oxidation state to the +3 state. Ammonia produced in the reaction forms a complex with Zn2+ to give [Zn (NH3 ) 4 ] 2+. The cell has a potential of nearly 1.5 V.
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In a dry cell , which of the following are used as a electrolyte ?a)Ammonium chloride and zinc chlorideb)Sodium chloride and calcium chloridec)Ammonium chloride and calcium chlorided)Magnesium chloride and ammonium chloridee)None of the above/More than one of the aboveCorrect answer is option 'A'. Can you explain this answer?
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