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How can we remove defects of simple cell?

Important Questions on Current Electricity

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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
Which colourless gas evolves when NH4Cl reacts with zinc in a dry cell battery ?
HARD
Physics>Electricity and Magnetism>Current Electricity>Electric Cell
Draw a neat labelled diagram of a Dry cell and write the cell reactions taking place at both the electrodes. 
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
The cathode reaction in the dry cell will be
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
While giving labelled diagram of dry cell write reactions taking place at cathode and anode.
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
Which of the following statements regarding the Leclanche cell is TRUE?
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
What are primary cells? Describe dry cell in short.
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
In a standard weston cell _____ metal gets oxidised at anode. (Write the name of the metal)
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
In the dry cell, the reaction which takes place at the anode is _____.
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell

Why is Weston cadmium cell considered a standard cell.

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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
What is Weston cadmium cell 
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
A depolarizer used in dry cell batteries is
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
In a Leclanche cell, MnO2 acts as _____.
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
In dry cell, what acts as negative electrode?
MEDIUM
Physics>Electricity and Magnetism>Current Electricity>Electric Cell
Describe the construction of the standard weston cell.
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
The reactions that occurs at the cathode of a common dry cell is
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
Write the reactions taking place at both electrodes of a standard weston cell. Also write the overall cell reaction.
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
Sketch and describe the operation of dry cell.
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
What are primary cells? Give the construction and working of a dry cell?    
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
Which one among the following is an electrochemical cell that cannot be charged?
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Physics>Electricity and Magnetism>Current Electricity>Electric Cell
Give the different types of batteries and explain the construction and working of each type of battery.